As soon as Apple opens their OS for supporting third party hardware, they will win my vote. That will not happen anytime soon, so PC FTW!
I am a gamer. There is no way I could go Mac. Now, as I said above, if they were to open their OS for others to build hardware for it, it would gain marketshare like no ones business, which would mean more games built for them, which would mean I would have to give them a serious look.
For now ... PC.