I find it a little ironic that the Nintendo Wii was lauded as the system that redefined gaming with it's amazing new controller, yet it's the system that has the most accessories available to make said controller better.
Take this inflatable combat set, for example. Do you really need a giant inflatable sword and shield set to make the game more fun? It seems to me like these are distractions, as you're not supposed to be focusing on the crap in your hands, but the stuff on your screen. The best games become second nature because the controls are intuitive and feel forgettable, while this would always make you focus on the big goofy crap you have in your hands. Oh well, to each his or her own, I suppose.