For the longest time, I had one character, no matter what the campaign for D&D: elven ranger...changed the name, the stats, but it always the same...a loner type, always chaotic good, and always trying to be helpful, though that was due to a "pack mentality". I branched out eventually, but in recent games (the past few years), I've played a kind of Garrett from the Thief series knock-off, just because its fun to be a very professional asshole that only cares about money and himself....unless the situation calls for something different.
Oh, and I got Rogue in the quiz, but that wasn't too difficult, its not like they made getting that result vague or anything.
