diff --git a/src/interactive.jl b/src/interactive.jl
index 991ead4..dfe2273 100644
--- a/src/interactive.jl
+++ b/src/interactive.jl
@@ -16,15 +16,6 @@ else
     show_field(x::AbstractString) = repr(contractuser(x))
 end
 
-"""
-    interactive(::Type{T<:Plugin}) -> T
-
-Create a [`Plugin`](@ref) of type `T` interactively from user input.
-"""
-function interactive(::Type{T}) where T <: Plugin
-    return T()  # TODO
-end
-
 function Base.show(io::IO, m::MIME"text/plain", t::Template)
     println(io, "Template:")
     foreach(fieldnames(Template)) do n
@@ -41,6 +32,29 @@ function Base.show(io::IO, m::MIME"text/plain", t::Template)
     end
 end
 
+"""
+    interactive(::Type{T<:Plugin}) -> T
+
+Create a [`Plugin`](@ref) of type `T` interactively from user input.
+"""
+function interactive(::Type{T}) where T <: Plugin
+    kwargs = Dict{Symbol, Any}()
+
+    foreach(fieldnames(T)) do name
+        F = fieldtype(T, name)
+        v = Val(name)
+        required = !applicable(defaultkw, T, v)
+        default = required ? defaultkw(F) : defaultkw(T, v)
+        kwargs[name] = if applicable(prompt, T, v)
+            prompt(F, "$T: $(prompt(T, v))", default, required=required)
+        else
+            prompt(F, "$T: Value for field '$name' ($F)", default; required=required)
+        end
+    end
+
+    return T(; kwargs...)
+end
+
 leaves(T::Type) = isconcretetype(T) ? [T] : vcat(map(leaves, subtypes(T))...)
 
 function plugin_types()
@@ -56,28 +70,34 @@ function Template(::Val{true}; kwargs...)
     opts = Dict{Symbol, Any}(kwargs)
 
     if !haskey(opts, :user)
-        opts[:user] = prompt(String, "Git hosting service username", defaultkw(:user))
+        default = defaultkw(Template, :user)
+        opts[:user] = prompt(String, "Git hosting service username", default)
     end
 
     if !haskey(opts, :host)
-        opts[:host] = prompt(String, "Git hosting service URL", defaultkw(:host))
+        default = defaultkw(Template, :host)
+        opts[:host] = prompt(String, "Git hosting service URL", default)
     end
 
     if !haskey(opts, :authors)
-        opts[:authors] = prompt(String, "Package author(s)", defaultkw(:authors))
+        default = defaultkw(Template, :authors)
+        opts[:authors] = prompt(String, "Package author(s)", default)
     end
 
     if !haskey(opts, :dir)
-        opts[:dir] = prompt(String, "Path to package parent directory", defaultkw(:dir))
+        default = defaultkw(Template, :dir)
+        opts[:dir] = prompt(String, "Path to package parent directory", default)
     end
 
     if !haskey(opts, :julia)
-        opts[:julia] = prompt(VersionNumber, "Supported Julia version", defaultkw(:julia))
+        default = defaultkw(Template, :julia)
+        opts[:julia] = prompt(VersionNumber, "Supported Julia version", default)
     end
 
     if !haskey(opts, :disable_defaults)
         available = map(typeof, default_plugins())
-        opts[:disable_defaults] = select("Select defaults to disable:", available, [])
+        initial = defaultkw(Template, :disable_defaults)
+        opts[:disable_defaults] = select("Select defaults to disable:", available, initial)
     end
 
     if !haskey(opts, :plugins)
@@ -91,20 +111,35 @@ function Template(::Val{true}; kwargs...)
     return Template(Val(false); opts...)
 end
 
-function prompt(::Type{String}, s::AbstractString, default; required::Bool=false)
+defaultkw(::Type{String}) = ""
+defaultkw(::Type{Union{T, Nothing}}) where T = nothing
+defaultkw(::Type{T}) where T <: Number = zero(T)
+defaultkw(::Type{Vector{T}}) where T = T[]
+
+function prompt(
+    ::Type{<:Union{String, Nothing}}, s::AbstractString, default;
+    required::Bool=false,
+)
     default isa AbstractString && (default = contractuser(default))
-    default_display = required ? "REQUIRED" : repr(default)
+    default_display = if required
+        "REQUIRED"
+    elseif default === nothing
+        "None"
+    else
+        repr(default)
+    end
+
     print("$s [$default_display]: ")
     input = strip(readline())
+
     return if isempty(input) && required
-        println("This  option is required")
+        println("This option is required")
         prompt(String, s, default; required=required)
     elseif isempty(input)
         default
     else
         input
     end
-
 end
 
 function prompt(
@@ -123,11 +158,19 @@ end
 
 function prompt(::Type{Bool}, s::AbstractString, default::Bool; required::Bool=false)
     b = prompt(String, s, default; required=required)
-    return uppercase(b) in ("Y", "YES", "T", "TRUE")
+    return b === default ? default : uppercase(b) in ("Y", "YES", "T", "TRUE")
 end
 
-function prompt(::Type{Vector{String}}, s::AbstractString, default::Vector{<:AbstractString})
-    # TODO
+function prompt(::Type{Vector}, s::AbstractString, default::Vector; required::Bool=false)
+    return prompt(Vector{String}, s, default; required=required)
+end
+
+function prompt(
+    ::Type{Vector{String}}, s::AbstractString, default::Vector{<:AbstractString};
+    required::Bool=false,
+)
+    s = prompt(String, "$s (comma-delimited)", join(default, ", "); required=required)
+    return convert(Vector{String}, map(strip, split(s, ","; keepempty=false)))
 end
 
 # TODO: These can be made simpler when this is merged:
@@ -144,8 +187,8 @@ function select(f::Function, s::AbstractString, xs::Vector, initial::Vector)
 end
 
 # Select one item frm oa collection.
-function select(f::Function, s::AbstractString, xs::Vector, _initial)
-    # Can't use the initial value yet.
-    selection = request(s, RadioMenu(map(f, xs)))
+function select(f::Function, s::AbstractString, xs::Vector, initial)
+    print(stdin.buffer, repeat("\e[B", findfirst(==(initial), xs) - 1))
+    selection = request("$s:", RadioMenu(map(f, xs); pagesize=length(xs)))
     return xs[selection]
 end
diff --git a/src/plugin.jl b/src/plugin.jl
index 52fd04c..23cf306 100644
--- a/src/plugin.jl
+++ b/src/plugin.jl
@@ -235,6 +235,11 @@ If you are implementing a plugin that uses the `user` field of a [`Template`](@r
 """
 needs_username(::Plugin) = false
 
+function prompt end
+
+iscall(x, ::Symbol) = false
+iscall(ex::Expr, s::Symbol) = ex.head === :call && ex.args[1] === s
+
 """
     @with_defaults struct T #= ... =# end
 
@@ -253,13 +258,28 @@ end
 ```
 """
 macro with_defaults(ex::Expr)
-    T = esc(ex.args[2].args[1])
+    T = esc(ex.args[2].args[1])  # This assumes T <: U.
 
-    # TODO: Parse out `<- "prompt"` stuff.
-    funcs = map(filter(arg -> arg isa Expr && arg.head === :(=), ex.args[3].args)) do arg
-        name = QuoteNode(arg.args[1].args[1])
-        val = arg.args[2]
-        :(PkgTemplates.defaultkw(::Type{$T}, ::Val{$name}) = $(esc(arg.args[2])))
+    # This is a bit nasty.
+    funcs = Expr[]
+    foreach(filter(arg -> arg isa Expr, ex.args[3].args)) do arg
+        if iscall(arg, :<) && iscall(arg.args[3], :-)  # x::T <- "prompt"
+            name = QuoteNode(arg.args[2].args[1])
+            prompt = arg.args[2]
+            push!(funcs, :(PkgTemplates.prompt(::Type{$T}, ::Val{$name}) = $(esc(prompt))))
+        elseif arg.head === :(=)
+            rhs = arg.args[2]
+            if iscall(rhs, :<) && iscall(rhs.args[3], :-)  # x::T = "foo" <- "prompt"
+                name = QuoteNode(arg.args[1].args[1])
+                prompt = rhs.args[3].args[2]
+                default = arg.args[2] = rhs.args[2]
+                push!(
+                    funcs,
+                    :(PkgTemplates.prompt(::Type{$T}, ::Val{$name}) = $(esc(prompt))),
+                    :(PkgTemplates.defaultkw(::Type{$T}, ::Val{$name}) = $(esc(default))),
+                )
+            end
+        end
     end
 
     return Expr(:block, esc(with_kw(ex, __module__, false)), funcs...)
diff --git a/src/plugins/ci.jl b/src/plugins/ci.jl
index 0b2b41b..a9ce0fc 100644
--- a/src/plugins/ci.jl
+++ b/src/plugins/ci.jl
@@ -45,13 +45,13 @@ Integrates your packages with [Travis CI](https://travis-ci.com).
 $EXTRA_VERSIONS_DOC
 """
 @with_defaults struct TravisCI <: BasicPlugin
-    file::String = default_file("travis.yml")
-    linux::Bool = true
-    osx::Bool = true
-    windows::Bool = true
-    x86::Bool = false
-    coverage::Bool = true
-    extra_versions::Vector = DEFAULT_CI_VERSIONS
+    file::String = default_file("travis.yml") <- "Path to .travis.yml template"
+    linux::Bool = true <- "Enable Linux bulds"
+    osx::Bool = true <- "Enable OSX builds"
+    windows::Bool = true <- "Enable Windows builds"
+    x86::Bool = false <- "Enable 32-bit builds"
+    coverage::Bool = true <- "Enable code coverage submission"
+    extra_versions::Vector = DEFAULT_CI_VERSIONS <- "Extra Julia versions to test"
 end
 
 source(p::TravisCI) = p.file
@@ -114,10 +114,10 @@ Integrates your packages with [AppVeyor](https://appveyor.com) via [AppVeyor.jl]
 $EXTRA_VERSIONS_DOC
 """
 @with_defaults struct AppVeyor <: BasicPlugin
-    file::String = default_file("appveyor.yml")
-    x86::Bool = false
-    coverage::Bool = true
-    extra_versions::Vector = DEFAULT_CI_VERSIONS
+    file::String = default_file("appveyor.yml") <- "Path to .appveyor.yml template"
+    x86::Bool = false <- "Enable 32-bit builds"
+    coverage::Bool = true <- "Enable code coverage submission"
+    extra_versions::Vector = DEFAULT_CI_VERSIONS <- "Extra Julia versions to test"
 end
 
 source(p::AppVeyor) = p.file
@@ -167,10 +167,10 @@ $EXTRA_VERSIONS_DOC
     Code coverage submission from Cirrus CI is not yet supported by [Coverage.jl](https://github.com/JuliaCI/Coverage.jl).
 """
 @with_defaults struct CirrusCI <: BasicPlugin
-    file::String = default_file("cirrus.yml")
-    image::String = "freebsd-12-0-release-amd64"
-    coverage::Bool = true
-    extra_versions::Vector = DEFAULT_CI_VERSIONS
+    file::String = default_file("cirrus.yml") <- "Path to .cirrus.yml template"
+    image::String = "freebsd-12-0-release-amd64" <- "FreeBSD image"
+    coverage::Bool = true <- "Enable code coverage submission"
+    extra_versions::Vector = DEFAULT_CI_VERSIONS <- "Extra Julia versions to test"
 end
 
 source(p::CirrusCI) = p.file
@@ -216,10 +216,10 @@ See [`Documenter`](@ref) for more information.
     Nightly Julia is not supported.
 """
 @with_defaults struct GitLabCI <: BasicPlugin
-    file::String = default_file("gitlab-ci.yml")
-    coverage::Bool = true
+    file::String = default_file("gitlab-ci.yml") <- "Path to .gitlab-ci.yml template"
+    coverage::Bool = true <- "Enable code coverage submission"
     # Nightly has no Docker image.
-    extra_versions::Vector = map(format_version, [default_version(), VERSION])
+    extra_versions::Vector = map(format_version, [default_version(), VERSION]) <- "Extra Julia versions to test"
 end
 
 gitignore(p::GitLabCI) = p.coverage ? COVERAGE_GITIGNORE : String[]
diff --git a/src/plugins/citation.jl b/src/plugins/citation.jl
index fcb8e6f..68b6f25 100644
--- a/src/plugins/citation.jl
+++ b/src/plugins/citation.jl
@@ -8,8 +8,8 @@ Creates a `CITATION.bib` file for citing package repositories.
 - `readme::Bool`: Whether or not to include a section about citing in the README.
 """
 @with_defaults struct Citation <: BasicPlugin
-    file::String = default_file("CITATION.bib")
-    readme::Bool = false
+    file::String = default_file("CITATION.bib") <- "Path to CITATION.bib template"
+    readme::Bool = false <- """Enable "Citing" README section"""
 end
 
 tags(::Citation) = "<<", ">>"
diff --git a/src/plugins/coverage.jl b/src/plugins/coverage.jl
index 58b4cae..26d11df 100644
--- a/src/plugins/coverage.jl
+++ b/src/plugins/coverage.jl
@@ -9,7 +9,7 @@ Sets up code coverage submission from CI to [Codecov](https://codecov.io).
 - `file::Union{AbstractString, Nothing}`: Template file for `.codecov.yml`, or `nothing` to create no file.
 """
 @with_defaults struct Codecov <: BasicPlugin
-    file::Union{String, Nothing} = nothing
+    file::Union{String, Nothing} = nothing <- "Path to .codecov.yml template"
 end
 
 source(p::Codecov) = p.file
@@ -30,7 +30,7 @@ Sets up code coverage submission from CI to [Coveralls](https://coveralls.io).
 - `file::Union{AbstractString, Nothing}`: Template file for `.coveralls.yml`, or `nothing` to create no file.
 """
 @with_defaults struct Coveralls <: BasicPlugin
-    file::Union{String, Nothing} = nothing
+    file::Union{String, Nothing} = nothing <- "Path to .coveralls.yml template"
 end
 
 source(p::Coveralls) = p.file
diff --git a/src/plugins/git.jl b/src/plugins/git.jl
index c1ec679..8ba5718 100644
--- a/src/plugins/git.jl
+++ b/src/plugins/git.jl
@@ -13,10 +13,10 @@ Creates a Git repository and a `.gitignore` file.
   This option requires that the Git CLI is installed, and for you to have a GPG key associated with your committer identity.
 """
 @with_defaults struct Git <: Plugin
-    ignore::Vector{String} = []
-    ssh::Bool = false
-    manifest::Bool = false
-    gpgsign::Bool = false
+    ignore::Vector{String} = String[] <- "Gitignore entries"
+    ssh::Bool = false <- "Enable SSH Git remote"
+    manifest::Bool = false <- "Commit Manifest.toml"
+    gpgsign::Bool = false <- "GPG-sign commits"
 end
 
 # Try to make sure that no files are created after we commit.
diff --git a/src/plugins/license.jl b/src/plugins/license.jl
index f6bf72c..5a2fc20 100644
--- a/src/plugins/license.jl
+++ b/src/plugins/license.jl
@@ -16,7 +16,7 @@ struct License <: BasicPlugin
     destination::String
 end
 
-function License(
+function License(;
     name::AbstractString="MIT",
     path::Union{AbstractString, Nothing}=nothing,
     destination::AbstractString="LICENSE",
@@ -28,10 +28,21 @@ function License(
     return License(path, destination)
 end
 
-
 source(p::License) = p.path
 destination(p::License) = p.destination
 view(::License, t::Template, ::AbstractString) = Dict(
     "AUTHORS" => join(t.authors, ", "),
     "YEAR" => year(today()),
 )
+
+function interactive(::Type{License})
+    destination = prompt(String, "License: License file destination", "LICENSE")
+    return if prompt(Bool, "License: Use custom license file", false)
+        path = prompt(String, "License: Path to custom license file", ""; required=true)
+        License(; path=path, destination=destination)
+    else
+        available = sort(readdir(joinpath(TEMPLATES_DIR, "licenses")))
+        name = select("License: Select a license", available, "MIT")
+        License(; name=name, destination=destination)
+    end
+end
diff --git a/src/plugins/readme.jl b/src/plugins/readme.jl
index c277f62..f982fab 100644
--- a/src/plugins/readme.jl
+++ b/src/plugins/readme.jl
@@ -15,9 +15,9 @@ By default, it includes badges for other included plugins
 - `inline_badges::Bool`: Whether or not to put the badges on the same line as the package name.
 """
 @with_defaults struct Readme <: BasicPlugin
-    file::String = default_file("README.md")
-    destination::String = "README.md"
-    inline_badges::Bool = false
+    file::String = default_file("README.md") <- "Path to README.md template"
+    destination::String = "README.md" <- "README file destination"
+    inline_badges::Bool = false <- "Enable inline badges"
 end
 
 source(p::Readme) = p.file
diff --git a/src/plugins/src_dir.jl b/src/plugins/src_dir.jl
index 38b9acc..9f0c58a 100644
--- a/src/plugins/src_dir.jl
+++ b/src/plugins/src_dir.jl
@@ -7,7 +7,7 @@ Creates a module entrypoint.
 - `file::AbstractString`: Template file for `src/<module>.jl`.
 """
 @with_defaults mutable struct SrcDir <: BasicPlugin
-    file::String = default_file("src", "module.jl")
+    file::String = default_file("src", "module.jl") <- "Path to src/<module>.jl template"
     destination::String = joinpath("src", "<module>.jl")
 end
 
diff --git a/src/plugins/tests.jl b/src/plugins/tests.jl
index 1dc4684..e125ee1 100644
--- a/src/plugins/tests.jl
+++ b/src/plugins/tests.jl
@@ -15,8 +15,8 @@ Sets up testing for packages.
     Managing test dependencies with `test/Project.toml` is only supported in Julia 1.2 and later.
 """
 @with_defaults struct Tests <: BasicPlugin
-    file::String = default_file("test", "runtests.jl")
-    project::Bool = false
+    file::String = default_file("test", "runtests.jl") <- "Path to runtests.jl template"
+    project::Bool = false <- "Enable test/Project.toml"
 end
 
 source(p::Tests) = p.file
diff --git a/src/template.jl b/src/template.jl
index 9a08ae0..fa19018 100644
--- a/src/template.jl
+++ b/src/template.jl
@@ -127,14 +127,14 @@ function getplugin(t::Template, ::Type{T}) where T <: Plugin
 end
 
 # Get a keyword, or compute some default value.
-getkw(kwargs, k) = get(() -> defaultkw(k), kwargs, k)
+getkw(kwargs, k) = get(() -> defaultkw(Template, k), kwargs, k)
 
 # Default Template keyword values.
-defaultkw(s::Symbol) = defaultkw(Val(s))
-defaultkw(::Val{:authors}) = default_authors()
-defaultkw(::Val{:dir}) = Pkg.devdir()
-defaultkw(::Val{:disable_defaults}) = DataType[]
-defaultkw(::Val{:host}) = "github.com"
-defaultkw(::Val{:julia}) = default_version()
-defaultkw(::Val{:plugins}) = Plugin[]
-defaultkw(::Val{:user}) = default_user()
+defaultkw(::Type{T}, s::Symbol) where T = defaultkw(T, Val(s))
+defaultkw(::Type{Template}, ::Val{:authors}) = default_authors()
+defaultkw(::Type{Template}, ::Val{:dir}) = Pkg.devdir()
+defaultkw(::Type{Template}, ::Val{:disable_defaults}) = DataType[]
+defaultkw(::Type{Template}, ::Val{:host}) = "github.com"
+defaultkw(::Type{Template}, ::Val{:julia}) = default_version()
+defaultkw(::Type{Template}, ::Val{:plugins}) = Plugin[]
+defaultkw(::Type{Template}, ::Val{:user}) = default_user()