If you had to, how would you modify your favorite game controller to be more comfortable to you?
For instance, on my DS I'd make the buttons just a little bit bigger or just a little more spaced out.
And for the GameCube controller, I'd make the Dpad larger and make the LR triggers a bit wider and less half circular. I'd also replace the rubber on the control stick to something stronger that what it was.
And for playstation's Dualshock design for PSX/PS2, some rubberized padding on the shoulder buttons would be nice. I'd also make the face buttons look a bit better color wise. Make the X button a bit bluer and the circle button more of an obvious orange instead of the reddish orange one. Maybe make the triangle button forest green.
And if I could modify the xbox 360 controller I'd make it the Xbox one controller because damn does that feel good in my hands, the triggers especially. No more narrow triggers that hurt my finger after holding it down for a while
In racing or shooting games. Microsoft got it right on that one.