First up, I still use the Wacom and Stylus on my right hand, and put the game controller under my left. Mine is a Belkin game controller, widely available.

Anyway, the game controller can be programmed where certain keys or buttons equals specific functions in Photoshop. You basically assign your Photoshop actions and shortcuts to the game controller. This becomes very second nature quickly, and speeds up the process a bit.

The beauty of these generic game controllers is they have lots of buttons and wheels and options, but they can adapt to pretty much any program–Illustrator, Gimp, Manga Studio, etc.

how the heck are you using a game controller to do your coloring? can you describe the technique a little?

thanks!