It's a toss-up between the ColecoVision or the Intellivision II controls. Coleco's controllers did have that nifty sheet overlay you could slip into them with a built in number pad. But, that numberpad made the controllers excessively large and the 8 directional control stick was often times un-responsive. The intellivision was similar, but had smaller overall controls. Its biggest downfall was the 'sorta analog' control pad and it made going a specific direction very challenging and frustrating (just 8 directions would have been nice). I think overall, the award of worst controller goes to the intellivision II.

once again it is the RCA studio 2, this is the worst system ever, and the controllers were equally bad, a clunky unresponsive number pad mounted to the system

Gamecube, no matter what I'm aiming for I always seem to hit A.

I'd say the original play station controller is the worst, I hate it!!!

Gamecube was the most comfortable controller to hold, just a little better than the Wiimote in some ways, but the ability to sprawl out with teh Wiimote and Nunchuck bring that one up to the best.

On the other side of things, I'd have to say that the

I actually like the PS2 better in some ways, I rather like the idea that the 2 joysticks actually work as buttons. Unfortunately, the thing ranks as pretty much my most disliked controller due to the fact that it doesn't really FIT your hand at ALL.

Also, what the heck is with people who didn't like the N64 controller? YOU DON'T NEED THREE HANDS TO HOLD IT!!!! You either hold the middle spoke in your left hand for game that use the control stick, or you hold the left spoke in your left hand for games that use the D pad.
Do you have any idea how frustrating it is watching morons hold the outside spoke while keeping their thumb on the joystick?
I'm totally not certain they even realized that there even was a Z button.

For me it is the original Xbox controller. Reasons are its size, the horrible d-pad and, what may only be true for me, the shape of the buttons. I really prefer them to be flat and not round, I am never sure if I really press them with those buttons.

The playstation controllers are average imo. I don't like their control sticks, they feel very unprecise compared with Nintendo's (both 3D consoles) at least for me. I also dislike that the d-pad is actually only four buttons, but that is a minor thing. That the control stick is not in the main position is a bigger problem though.

I haven't handled much more controllers, so that's it more or less. The 360 controller btw makes a lot of things right imo, but the shape of the buttons is still the same as on the original Xbox controller.

Original xbox controller.

it was about this big.
thats about ballpark.

My ps2 controllers always break so i would have to say them.

xbox =) not only was it huge, but it had to have the absolute worst d-pad ever =p

Genesis. Thats Right Genesis.