My favorite villains are the disturbingly affable ones that are also unspeakably evil, such as Dr. Facilier from Disney's "The Princess and the Frog", Mr. Nick from "The Imaginarium of Dr. Parnassus", Oogie Boogie from "The Nightmare Before Christmas" (I feel kinda bad that I can't think of any favorite villains from books). Dr. Terwilliger from "The 5,000 Fingers of Dr. T" gets a mention, too, and I'm pretty sure he would have been just the same if we'd ever gotten to see the public face he presented to get parents to send their kids to his school.
My favorite side characters are the ones that don't act like real people--who process information in different ways, and can be bewildering, whether or not they're being helpful. This covers a lot of ground, from every single character in almost everything Lewis Carroll ever wrote, all the way over to some of the lighter characters in Kafka, most of all Odradek, a strange little wooden creature that does nothing in particular besides weird the narrator out. I also loved Artur and Jeremias, K's two "assistants" from "The Castle"; they spent most of their time making fun of him and lounging, eventually revealing that they were being paid by K's superiors to get him to lighten up. Then there was the pretentious, swaggering guide at the Lagado Projector's Academy from "Gulliver's Travels"--my favorite segment, and left out of almost every adaption. Douglas Adams did a lot of this, too, although there's not any one particular character I can single out. Q from Star Trek is totally there, too--I just love characters that don't think the way normal people do.
I had never realized before answering this post, but I don't seem to have a favorite type of hero. I used to be a big fan of the uptight everyman that's bewildered by everything around him (as my enjoyment of Kafka and Carroll can attest to), but once I started writing it got old really fast, and I don't feel like I've ever come up with a MC archetype that I'm really fond of. Heck, that might explain why I have so much trouble coming up with them...geez, I think I just got an insight into my writing. Thanks, Shippie!
* EDIT: Thinking about it, I made a list of my favorite heroes: Sam & Max, Axe Cop, Dick Solomon from "3rd Rock from the Sun", Baron Munchausen (book and movie), Dr. House, and so on. The unifying thing seems to be that, again, their thought processes are quite different from normals, and also they all have very high opinions of themselves--while they are indeed quite amazing, they think they are even greater than they are. "Il Capitano" types, in Commedia dell'Arte terms. I'm not sure what to do with this information, but I'm sure it will be put to good use!
Everybody loves using things as other things, right? Check out my blog at the Cromulent Bricoleur
and see one hipster's approach to recycling, upcycling, and alterna-cycling (which is a word I just made up).