Windows is a good product in general, although I disagree with the direction that MS is taking with the UI for desktops in Windows 8. Their interface is nice for touch-enabled devices, but not so nice for the classic keyboard/mouse combination. Performance and stability, however, are fine. I've only managed to crash my Windows 7 desktop a couple times since Windows 7 was released, and some of those times were my own fault.
I use Linux for the freedom and selection that it gives me as a user and as a software developer, not because Windows is an unacceptable choice. If I ever get to the point where all of my games work in either Linux or Wine, I'll probably delete the Windows partition on my main machine, and just keep a VM around for compatibility's sake.