I think I like the 360 controller the best. The weight, the contours, and the design is perfect for most standard, male, hands. The Nintendo 64 is a pretty close second though.
360 controller is definitely my fave! But what the fuck are they waiting for to change that dumb D-Pad!!?
360 being my fave, I still prefer PS controllers for fighting games. Except street fighter. But guilty gear/blazeblue just.... they dont work with a 360 controller, at least not for me.
Mine would have to be Dualshock 3, retaining tight, comfortable and accessibility of the Dualshock 2 while allowing me to play without worry of yanking the console of a table.
My favorite has to be the arcade joystick as I grew up playing fighting games and I still do today. Been thinking about picking up a joystick for my SSF IV ;)