I haven't used a Xbone/PS4 controller, but I think I'll always love the Wii U Pro controller... I don't know, it's just comfy, and easy to use. Also, 80 FREAKING HOURS OF BATTERY!

Does the Wii U gamepad qualify for a controller, because seriously i love it. If not its the Gamecube controller hands down.

Probably Xbox One. Very comfortable controller, just missing Windows support.

For old systems: The SNES controller
For more modern systems: Tie between DS3 and DS4 controller, maybe GC also

This. Gemcube controller had a terrible Z button though.

And the worst? Mouse+keyboard in some cases (Darksiders). Oh, and DUlashock 3 was the only one that made my hands sore.

This one:

Sooo delicious!

I've always like the PS controllers for fighting games, and the DS4 has improved analog and triggers, so overall DS4.

I was initially pretty interested in Xbox One's haptic feedback triggers. Haven't heard this being talked about much though.

PS4 controller for
for me!comfortable!!

Its a hard decision between the GameCube controller and the Xbox 360 controller, though the Wii U Pro controller is definitely growing on me.

Dualshock 4

Megadrive six button
Saturn boomerang controller