Chocolate -- ANYthing chocolate! Or, and these are "sort of" cupcakes since they get cooked in cupcake pans... You can make the recipe for cheesecake, put vanilla wafers in the bottoms of the cupcake pans (with papers!), pour cheesecake batter over the wafers, bake & top with cherry pie filling. Yummy, those are delicious! :)
Chocolate seem to be the easiest to make from scratch, vanilla can be a little harder. Also bean cake cupcakes are really good. Don't know if you have ever heard of them, you can look up a recipe. They are amazing, very fluffy. They don't seem home made at all, they turn out very gourmet. And are gluten free also.