If I absolutely have to choose a gamepad, I'll take the Playstation one. Only because I'm accustomed to it.
But all gamepads suck.
If you really like playing games, get a PC (they're not expensive anymore) and use the keyboard and mouse.
what our dear dhampy said
Other than FPS and RTS, and maybe fighting games (but than again you can use an arcade like thingy instead) the keyboard mouse is useless. Playing let's say Assassin's Creed.. with a keyboard is absolutely horrible. As I said, it really depends the type of game.
I agree, racing games too play better on gamepads.