I bought a mac book because it could run windows. I installed windows on it and i have tried unsuccessfully to get into the mac side of things. The dvd player doesn't work under windows, so i boot to mac to watch movies and such, but I always go back to windows.
Under Mac, I don't like the way the mouse moves. I don't like the window resizing. I don't like that I can't maximize a window. I don't like it isn't really all that stable. I get the spinny rainbow wheel. I've seen other people's macs lock up in the middle of a presentation. I find the mac constricting.
You may disagree with me, which is fine. But to say that people use windows because they are forced to isn't true. I use windows because I prefer it. Maybe it's just familiar. I dunno. I started out on Apple IIe's decades ago, but I don't really have a problem with windows. I think most microsoft issues are religious. When you add up the hardware and the software for a PC, they're much cheaper than macs. The hardware is nice, but I probably won't buy another one for myself.
EDIT: I do wonder sometimes if I'm "holding myself back" by not learning another environment. I do understand the advantages to *nix and another reason I bought the mac was the underlying kernel for the OS. Perhaps I just got locked in. I don't find it unsettling though.