As soon as I can fill the needs of my unnaturally addictive habit to CS:Source on a Mac, I'll switch. As soon as I can play through the marvelousness (is this a word?) that was Far Cry and HL2 on a Mac, I'll switch.
I'm a gamer. Nuff said.
And please, don't give me the BSOD or crash argument. If I were tweaking my OC'ing speeds on my processor, or Video Card or something, yea Windows crashes. Otherwise, I've pretty much never had Windows XP crash. I don't care if you believe me or not, but OSX crashes more often then Win XP does, which was once. For no reason, I had to shut the computer down and restart. Certain applications may crash in XP, but it never brings down the system with it. Explorer will crash for no reason. But then again, I know what I'm doing which is obviously the minority.
PC's are superior in every way, an argument can be made that OSX is a better OS, but until the OS is the most important thing to me, I'll never buy another Mac. I don't know what I was thinking when I bought the TiBook I did for school. Luckily, I sold it for almost as much as I bought it for. Resale value on those things is awesome.