I think I have a couple of favorite character. One is from the same campaign the Fell was talking about. My character, Bynnbob Boulderbum, or Bob for short, was a great character to play. He was sort of an incompetent dwarven wizard stuck in middle-management. He would have been a lot more fun had the GM not kept trying to force him perception of a wizard on the character (who ever said that every D&D wizard has to be able to cast magic missle, fireball, polymorph others, haste, etc...). Still, I liked the concept a lot so I had fun in my own little rpg world where my character wasn't the stereotype given him by the DM.
My more recent favourite character has been, Coelho d'Ouro, or translated the Golden Bunny. The Golden Bunny was just his secret identity as he was a nobleman by day and a savior of the downtrodden by night. He was sort of a Robin Hood, Scarlet Pimpernel type character. He had a secret hideout and his cohort/follower Peso (translated "weight" or "heavy"), a gnome wizard who needed constant rescuing. Coelho had amazing jumping abilities, was really lucky and fought with knifes. I had alot a fun with this character even though he was stuck in a Forgotten Realms campaign. Too bad, the campaing stopped short.
Course, someday I want to resurrect the character of Squeebe, who I never got to play. I just like idea a playing a goblin paladin who doesn't know he's a goblin and rides a warpig and has a boot tied to his helmet as his holy symbol.