fps with a mouse and keyboard feels like cheating it is so much better. and you hit the nail on the head with this :
But man is it easier on mouse especially with so many mice supporting multiple sensitivities that can be quickly hot swapped between for different situations.
slightly off topic but in the same vein, those of you that pc game with mouse and keyboard do you sit at a desk? i moved about 6 months ago and gave away my desk thinking i would just want to try switching to using the couch and tv for pc gaming. i thought it would be more comfortable, but now my wrist is the weak link since the mouse is on a weird angle on the couch arm.