
I own a Mac. But I mainly use a PC. What really makes me sour on using a Mac or even buying a Mac is firstly the fanatical Mac community that acts more like a cult at times and secondly the pretensiousness of Apple in how they market the thing. It's like they consider the on-line "jerk" to be their core market demographic.
When I hear some Mac guy talking about how they're doing all these neat things I just want to say "Yea, that's nice. I've been doing preemptive multitasking for a decade now. Sit down."
Check out this parody / spoof of the Mac vs. PC ads.