Day 1: First person who introduced you to D&D. Which edition? Your first character?
Michael Steel. He was one grade ahead of me in high school. I believe it was in 1979. A bunch of us were all into computers, fantasy/sci-fi books and movies. Mike introduced us to D&D over time and eventually we ended up going over to his house to play a game. It was awesome! It stuck with me for ever after.
The edition we first played was 1E, the blue box (Holmes), though we quickly migrated to AD&D.
I don't remember my true first character, but the first one I do remember is Filkar the Pickpocket, a thief with some fighting ability.