I've been engaged in the D20 biz for over a decade as both DM and player. I enjoy playing well thought out characters that tread fine lines of redemption or damnation.
My favorite class is: Wizard (Necromancy)
My favorite monster is: Kytons
My favorite alignment is: Lawful Evil (The best bad guys have a set of rules)
My favorite storyline is: The way of the wicked, by Fire mountain games
My least favorite thing: Murder hobos