Well, there's help for you. I'm over at Buckeye Girl's fun books blog this week with a post that clears it all up - it lists the kinds of villains that exist, or at least all the ones I could think of...and reveals the chocolate they are most like. And I also talk about my own villains.
And if you are nice and leave a comment telling the villain type you prefer, you might win chocolate from me!! Come say hi at A Buckeye Girl Reads.