Uhg, I've been witness to some pretty awful MAC/PC battles...
They're both computers, they both do the same thing... It's just a matter of preference and mostly style.
I've switched to MAC after getting frustrated with the troubles I had on Vista. I find MAC suits my lifestyle perfectly fine, I'm very happy with it.
The customization of PC is definitely a plus. I may build myself a wicked PC gaming rig in the future.