I went with a Macbook instead of a PC Laptop because I wanted to have a reliable laptop while in college, one that won't crash on me the night before a paper is due. And yes, while no computer is 100% guaranteed not to crash, from what I've read, Mac OSX is really stable. I also went with a Macbook because I wanted a light, yet powerful laptop, and one with a good battery life. The icing on the cake was the fact that I got a free printer, and after applying my university discount and selling my iPod Touch (I already have a Sansa that I love), it cost me about $1100 after tax. I got the higher end white Macbook as well, so it's not like it was the skimpy one. All in all, I'm more than satisfied with the Macbook.
Oh and as for buying the black one, I fully agree with skaheadpunk. Unless you absolutely need the black color, the 90 gig gain in storage isn't worth the extra $200.