Unfortunately, I've DM'ed a lot more than I've played 3.X edition. In all the editions of the game, my favorite class has always been thief/rogue (it'll always be thief, to me), then ranger, assassin (1st edition), and the tried and true fighter. For 3rd edition, I've played a rogue and a sorcerer. I really like the item creation rules for 3.X, but I've never really cared for the magic-using classes.