I'll vote PC, since it can run Windows, Linux, or even OSX(although not legitimately).

At home, I have 1 Linux machine, 5 Windows machines, and 0 OSX. Setting aside the smugness of the company in general, my biggest problem with Apple is that I don't see the value. They're far more expensive than the PC, have limited upgrade paths, and limited application support. Sure, there are a couple of killer apps for Apple, but I just don't think they're worth the price of admission. Every time I have ever thought of buying an Apple, I always end up comparing how much PC I could get for the same price- there's no contest.