Maybe he likes the structure of the OS better. As an owner of both a Mac and PC, I can understand why some may prefer a Mac. OSX is intuitively designed around doing what you want to do with as little effort as possible. For example, you don't have to screw around with the registry and installing programs is a simple drag and drop. I've also only had one crash ever on my Macbook whereas my PC is always somewhat unpredictable.
More on topic, I think zircon already said what needed to be said. Bootcamp isn't emulation. It's purebred Windows running on hardware inside an Apple chassis. I've never been able to install Bootcamp, though, because of some sort of fragmentation problem on my Macbook HDD.