I love Hellboy, especially Hellboy 2. Something about him just makes me want to draw tons of pictures of him.
Maybe it's because his face seems so...sculpted (lots of shadow and light areas...does that make sense?). He's a lot of fun to draw.
If I could throw a fancy dinner party and I could have anyone in this world as my guests, Guillermo del Toro would be one of them, along with Neil Gaiman, Yoshitaka Amano, Tim Burton, Kojima Ayami, and Garrison Keillor.