Not to derail other threads with this topic, figured I'd give it it's own little section of the board. I posted my desire in the thread the question was raised but I'll do it here too.
I'd love to see a Chronomancer of some kind. A class that could slow/speed things up and really make use of the physics engine and do some wacky stuff with it. The backstory wouldn't be to hard, messing with time is a serious deal and should get you locked away if you abuse that ability.