It's hard to boil it down... I like the idea of 1-20 campaigns. Long and chock full of goodies! I don't like playing multiple lower level campaigns (which I have experienced) it's frustrating. I am willing to play any class/alignment, whatever I'm needed to do.
I am 30 and I have roughly 4 years playtime. I've played D&D 3.5 and I'm also interested in Pathfinder... Haven't played it yet but I'm excited to! I've played in the Forgotten Realms and Greyhawk settings and like them both. I like to think outside the box when generating characters... Not always something crazy, just something rarely done. (Rarely worshipped deities, using improvised weapons, NOT being a blaster-type caster) that sort of stuff.