In general, I am very aggressive, so I tend to gravitate toward Glass Cannons and Mages, particularly speedy Ninja-type classes and Elemental Mages. This is mostly due to my attention problems; Ninjas move fast, so there's a lot of motion on screen, and elemental mages make pretty lights. I absolutely hate being a tank because I don't do anything but stand around defending. Medics/Priests/White Mages/whatever don't really contribute to damage, so I don't really like them, even though I try to learn a few healing spells/skills as other classes; I can't always count on my team-mates to heal me in time.