I've never used a Mac in my life. I've always used either Windows/Linux. I have heard of OSX but I'm not sure whether or not that's legal. Is OSX legal or do I need to own a Mac in order to install it on my Windows PC? :ermm:
It is not currently legal to run Mac OSX on non Apple hardware, aside from the hurdles of next to no PC shipping with an EFI motherboard.
I'd recommend just getting a Mac, if you still want Windows or Linux you can either dual boot with BootCamp or use virtualisation.