as a kid i played keyboard and mouse for all the games i played at the time (backyard sports franchise and other humongous games like freddi fish, putt putt etc.) then i moved to ps2 and then later 360 so now i am much more inclined to use a controller

i use controllers for RTS games on pc. one stick to scroll the map, other to select units. my wrists are too weak to use a mouse for several hours

First/Third person shooters and tabletop-esque games, keyboard and mouse. Pretty much everything else, gamepad.