I've seen WoW users with 15 button mice, and old school gamers that use only a keyboard and no mouse at all.
Wouldn't the answer differ for each person?
Ok, so I have been really getting into a lot of computer games lately, and frankly, the mouse I have to play them with sucks. So what is the best mouse on the market for computer gaming? Oh, it also can be either Mac or PC compatible since I play games on both.