Hmmm... my favourite character?
I am almost always on the “other” side of the DM’s screen, and the characters I’ve played are few.
I was very fond of Thoronim the cleric, my very first character, who was born with the BECMI rules and reached the 31st level after many years of play, but close second (very, very close) comes Wolfram, my paladin. I played Wolfram for a short time, and the gaming system was D&D4 (my only experience with that edition); I didn’t like the rules very much, but I had a lot of fun together with my fellow players and our DM.
So long live both Thoronim and Wolfram!