I really don't prefer Mac Vs. PC Vs. other OSes ... they each have their strong points and their weaknesses. I don't believe that any one of them is better than the other, generally speaking. Except when it comes to hardware and THEN Mac and PC are pretty much the same in my book. If you want to talk Sun/Solaris that's a different story.
The problem I have with this issue is that <i>most</i> people try to reduce it to black and white. It's not. It really comes down to what tool you are most comfortable with to do the job. Someone brought up video editing. I think the playing field is level there as far as Mac and PC goes; but if you're talking about ultra-high-end video editing and animation you'd want to look at *nix OSes.
I use PC for multi-track audio. Industry standard is Mac version of Pro-Tools. The reason I use PC? It's more affordable. I know <i>exactly</i> what hardware I'm using. I've built what I believe to be a machine that is comparable to a pro-sumer level Pro-Tools rig for a third of the cost. But if someone wanted to <i>give</i> me a real Pro-Tools rig I'd certainly appreciate it.
So I posted that link because I believe that's what this argument is really about ... brand loyalty.