Herein lies the rub, I think. You're obviously someone who buys a computer the same way they might buy a TV or washing machine - as a utilitarian device, that has to do a certain job to a certain level of ability. They're not products you feel any passion towards - it's just a tool.
For some people, computers are things they feel passion for, and it goes way back, well before Mac vs. PC - there was VIC-20 vs TI-99, C64 vs Sinclair Spectrum, Atari ST vs Amiga, even SNES vs. Sega Megadrive/Genesis for the gamers out there. You were passionate about your choice of system, and almost thrived on defending your choice to owners of its rival. As a user of a particular system, you become a member of a club, and you become proud of that. Nowadays, outside the realm of gaming, you see it most amongst Mac and Linux users. In the gaming world, it's still very obvious - Xbox vs PS3, DS vs PSP and so on.
It's an inanimate object, you shouldn't feel passion for it. Preferences are all fine and dandy, but defining yourself by it is taking it a bit far. I enjoy my PS3, but I'm not about to put a Sony sticker on my car and buy every version that comes out.