After owning an Xbox 360 for a few months, I still find myself often hitting the wrong button. When I have to press X, I press Y. Hit B really fast! D’oh, I just hit A. It didn’t take a lot of effort to figure out why. The button layout for the 360 controller is nearly identical to that of a Super Nintendo controller. Nearly.
The button letters and even the colour scheme (for non-North American SNES contollers) are the same. However, the X Y, and A B buttons are swapped around. Thus giving me sometimes no end of grief when I acidently hit B thinking it’s A on the 360 which usually cancels something rather than confirming it.
I do quite like the 360 controllers though, maybe because it is similar to my beloved SNES contollers? If only I could globally-perma-re-map the buttons.