I have favorite villain(s) they would have to be the vampires from Christine Feehan's Dark Series. They are some of the nastiest cold blooded killer's I've read about. However, they weren't always like that they use to be friends, brothers, and sons. It makes it all the more tragic when they have to be killed by the people they once knew. I like that there is more to them than just plain hatred or wanting to rule the world.
Whose your favorite villain? Let me know in the comments or leave a link to your post.