Althalus, hands down. (David Eddings, The Redemption of Althalus
.) Something about a thief who saves the world by swindling the avatar of a dark god just lights a nice little fire in my heart! And then he gets to marry the goddess of fertility and live forever in divine bliss...LOL!
Though, I love Polgara, Belgarath, Garion and the rest of the crew from The Belgariad and The Mallorean. Actually, I haven't come across an Eddings character that I didn't like...or like to hate...as the case may have been.
Will Stanton from Susan Cooper's The Dark is Rising
Sequence gets high props on the list...as does Erik LeBeau, the Phantom of the Opera. (However, Merriman Lyons and Raoul de Chaney are pretty high on my "Just HOW many ways can I torture and kill you?" List)
Batman's there, in my top twenty. With Edmond Dantes and The Musketeers (Book version, not movie, though they were yummy). Harry Potter and his crew are on the top twenty, as long as you don't try and talk to me about books 6 & 7...they don't exist in my world.
Jack Skellington, The Pumpkin King, trolls in my head sometimes, adding to the chaos...so I'd have to say he was a favorite.
Depending on my mood, Dracula sometimes pops up on the top list, as does Cardinal Richelieu.
But Richard, Chief Warlock of the Brothers of Darkness, Lord of the 13 Hells, Master of the Bones, Emperor of the Black, Lord of the Undead, and the Mayor of a little village up the coast...very scenic during springtime, you should visit, is always on my favorite characters list. (http://www.lfgcomic.com/
Just in case you're living under an internet rock somewhere.)
Um...guess I can't give just one, can I?
I could dig into the achieves of my brain and see who's on the list from Shakespeare, but I'm exhausted right now, so I'll pass.