At some point in time when I play in a group with a couple more people and I don't have to fulfill a certain roll, I'd love to try a Barbarian/Fighter/Sorcerer, sort of a samurai shodown fighting game type fighter. With a decent dex, mage armour, and shield the AC should be doable, and with expiditous retreat you could be a spring attacking madman. You would have some classic anime fighting techniqes, like mirror image. Probably wouldn't be the most effective character (though I'm of the opinion that with careful spell selection they should be able to hang with a fighter of equal level) but I think it would be fun to try out.