First up: Chocolate. I have made this recipe in the past for full-sized cupcakes, and it worked great. They had huge domes. But for some reason in mini size they had flat tops. And they were chewy (but in the best way). Yum! You can find the recipe here.
Next: Red Velvet. I had never made this recipe before, but it looked very much like the red velvet cake recipes I have made in the past. These didn't spread out at all, which made them really cute. They were delicious - light and fluffy. You can find the recipe here.
Finally: Vanilla. On Allrecipes, there was only one plain vanilla cupcake recipe. The reviews said that they were more like muffins, but I decided to go ahead. The had huge tops, and they were delicious, but the reviewers were right - they are more dense than cupcakes should be. But, everybody loved them and they would probably make excellent muffins. You can find the recipe here.
For the icing, I used a simple vanilla buttercream recipe I found at BakingBites. (2 sticks butter, 4 cups powdered sugar, 2-4 tbsp milk, 2 tsp vanilla).
All of these recipes are delicious, and a hit at parties! I recommend you make one (or three!) of them. Have fun!