I am a testament to this, I have only owned Macs, and a ton of them....I got so hyped about Macs that I collect them, and have bought and sold many of the years on eBay. My first Mac was an LC II when I was 10 years old in 1992. Buying my second Mac was a no-brainer...I wanted the best model I could get so I forked out for the Power Macintosh 9500/120 in 1995, with a little help from the family. The $5000+ price tag was a little tough for me to cover as a 13 year-old, but this Mac was totally awesome and lasted me 4 more years until I got a PowerMac G3, then a G4 (lasted me 6 years), then a Mac Pro, and been through several Mac Pros and MacBook Pros until current. First PowerBook was a 5300cs/100 in 1996...then a PowerBook G3 (owned Wallstreet, Lombard, Pismo), then PowerBook G4 Titanium....so yes, I have gone through many, many Macs through the years and loved all of them. Had pretty much zero troubles with them. Very well built quality Machines. But again, the Mac Operating System is, and always has been better than Windows, and that is the main reason for using a Mac, is the operating System. Even System 7 and System 8 were way ahead of Windows and DOS back in their times. Microsoft has always tried to simulate the Mac look-and-feel and Macintosh experience and always been half-ass at doing it. And I still feel the same way. There is so much in Mac OS X now today that still makes even Windows 7 look years behind.
So, staying with Mac has never been a question for me.