Pffff. PCs are so much more versatile. I see the appeal of Macs, but I could never use them as my primary computer, much less my sole computer.
Except that every Mac is in fact a PC and can run Windows, either natively through Bootcamp or in a VM such as Parallels. A Mac can run OS X and Windows, but a 'PC' can only run Windows.
What do you do on your PC that you don't think you could do on a Mac? I see this argument a lot and I think a lot of it has to do with an ignorance of what software is available for the platform. You are perfectly welcome to prefer Windows, but I am just curious to what you think is not doable on the Mac.