I personally don't like MS, not because it makes me look cool on the interwebz, or because it's the trend, or the nature of being against the big one; and certainly i don't dislike them by default...
I met Bill Gates in a conference (thanks to my ex-job), and he's a great guy, and i personally respect what he has done for the computer industry... But my reason for not liking MS is mainly the products...
-Windows is an OK OS, but i really don't need the crashes and the security issues... And when they pull something good like Windows XP SP2-SP3, they had to go backwards with Vista, a really unreliable and inefficient system, especially inefficient... I hope Windows 7 is better because i use Ubuntu for a lot of things, but my games and some work stuff i have to do them in Windows...
-IE, nuff said...
-Xbox brand: Xbox had more power than PS2 and Gamecube, that's for sure, and the unified online service is great, but it was inefficient in some levels, nevertheless i don't have a problem with it... Xbox360 on the other hand, RROD, disc-scratching, E74, jet-sounds (although, as i said, the unified online service is great, except for the price)...
I can mention other products but i think i made my point... Now they're some good products like the keyboards (although i like the Logitech ones better), and i even recommend some of them, so even when i dislike a company, i don't let the good things pass...