I've never ever used a Mac before, Ive seen them, but haven't actually touched them before.
I just don't see anything compelling about them. Sure, I use Photoshop on my Windows machine, but Photoshop on a Mac looks AND works EXACTLY the SAME!
The only thing that might compel me to go out and try a Mac is for Apple Aperture, and even than there have been windows programs that make your RAW workflow smoother and more efficient.
'bout the only thing i'd use a Mac for is porn because i'd be bulletproof and I could go anywhere i'd want and still have piece of mind. I can't do that on my PC.