Not to rain on anyone's parade, or anything, but I've never had issues with either PC's or Mac (grant my Mac time it limited to some hours at school and using the roommate computer both of which are new), but christ, everybody makes the other out to be soo bad. What in the world is everybody doing to their computers I'm missing out on? The only times my PC goofed is from me either downloading stuff I know shouldn't be in the first place, or messing with files I shouldn't. The only times my PC's blue screen or freeze, is when I'm doing too much, multiple browsers open, media player open, AIM open, and a game playing. But this is a hardware issue (need more ram, faster cpu, better video card), not a platform problem.
Or using Final Cut Pro to edit videos on the Macs at school. Haven't had any problems tossing around multiple ten's of gb's movie clips.