It’s Coke vs. Pepsi.
My wife prefers OSX, for 90% of what I do I really don’t care.
I use a Mac Book and a Toshiba Win 7 laptop. They both crash very rarely. I believe the Toshiba has a flaky memory stick that I haven’t gotten around to looking into. The Mac Book has had two broken power cords, a battery that died after about a year and now a broken DVD drive. (Sword, the replacement shows up this week, I may contact you for help if that’s still OK)
I can see liking one OS over the other and they are very nice and helpful at the Apple store, but honestly, I have not been overwhelmed with Apple quality.
When was the last time you purchased an Apple computer? The quality is dramatically better, even better than Sony.