I have my moments, just as much as any other person, when I'm not pacing myself. It's better for me to keep my thumb hovering in the middle of all four buttons, then near one specifically, which helps during the process.

The Xbox 360 controller takes the gold in my book, mainly because of it's size, and it's convenience of fitting into my hands perfectly.

Picked up a third-party controller from Wal-Mart ages ago for the Ps2, can't remember the brand name, and it didn't last that long which is probable why I don't remember in the first place.