FPS? Keyboard or controller?

I've got an opinion Yes I do. I don't like the 360 controller because my thumbs are both the same length and the 360 controller is built for a person w/ straight thumbs and I don't really believe in (A strong opinion - 360 Controller=weakness and kinda like hand cuffs) Halo3 players are weak.but they really cannot stand against a straight shooting Quake player (KB/mouse)