To be fair, I've never been an M$ fanboy, or on "their side". I'd always known that Windows wasn't the greatest, and I had plenty (PLENTY) of gripes with it, but I just couldn't be bothered making the switch because I'd been comfortably using Windows for all but the first 5 years of my life, and I couldn't be bothered learning new things.
I didn't know enough about Linux to be convinced that it'd be worth the bother, but after one too many "why the hell is my computer dying when I manage everything perfectly and run virus/adware scanners at least every 12 hours?!" moments, I figured, "what's the worst that could happen?"