Razer's Naga series has always been a bit eye-catching. Slapping tens of buttons on a gaming mouse will naturally make it stand out in the looks department, but having owned two Nagas in my lifetime, I can see it only really takes an evening to get why people love 'em.
MMOs are notorious for demanding lots of shortcuts and macros, and it's just not feasible on most keyboards to reach over to the nine key every thirty seconds. When considering the hundreds of hours MMOs tend to eat up, that's an awful lot of stretching time. You can make do with custom controls, but MMO mice offer not only out-of-the-box usability, but specifically crafted ergonomics.
