There's a few keys that are unchangeable. It actually drives me crazy. I (maybe because of FFXI) walk with numpad and usually turn my camera with arrow keys (with my thumb, right hand). I can't reassign arrow keys in this game. I have to turn with A) mouse or B) ijkl. Retarded. Pisses me off. There's a larger list of what I'd like to be able to hotkey and not be locked out of changing (i.e. everything) but this one really irks my nerves.