Personally, I have to go with Mac, hands down. My beautiful 13" MacBook Pro has never failed on me or slowed down. [Although I HAVE only had it for one year... so it's only expected that it still runs like a champ] Anyways, my review on Mac OS X: everything just simply works. No viruses, malware, etc. And the ease that they put in for making a dual-boot is fantastic! I have a 32GB partition for Windows 7 [though I never use that, since OS X is just so much better]. In fact, when I DO use my Win7 boot, it's just because I need to go on something that only works with PC. For example, Fallout 3. Although I tried to go on that about a week ago, and Windows failed me and it wouldn't load the game.
And although Mac OS X is fantastic, sometimes I do kind of wish that I had bought a Windows laptop only on the basis that it would have saved me about 600 dollars. But I'm not going to sell it; this beast is sure to last me through university.
So what do my fellow bloggers say? Mac or PC? (and why?)