I bought a Mac because, quite simply, I realized that Apple reignited my passion towards computing. I loved PCs for a decade, and just dealt with Windows as needed. Eventually the hardware got boring, and I turned to software...where the real innovation was. This in turn, led me to Linux, which led me to BSD, which eventually led to OS X. After 20 minutes of playing with it, I was hooked. Consequently, I became interested in hardware again, after a few months...something about the design of Apple's hardware is just undeniable....the Frank Lloyd Wright of computers.
So, this wasn't just a minor change for me...it was a change of mindset, and a conduit that brought back my passion for personal computing and technology.