Personality-wise? Probably a mage. I'm bookish, intelligent, and occasionally sarcastic (which all the cool mages are).
I'd also want to be a mage. Preferably a battlemage/magic knight/spellsword/paladin/Red Mage/whatever you'd like to call someone who uses magic but also has melee capabilities. Because a) That's what I almost always play in RPGs and b) I've already got some bo-staff skills, and the aforementioned mage-esque personality, so I might as well put 'em to use.
Looks-wise, alas, I am the warrior. Between my curvy figure (or, as one friend calls it, my "anime boobs") and my 5'9" height, I become the chainmain-bikini-clad warrior princess. Maybe, with luck, I can graduate to the leather-armor-bikini-clad rogue, because I know a bit of archery.