I can't believe it either, but I did. Let me tell you why...
I have always been attracted to the "cool" factor of Macs, but never thought it would be worth switching over just for that. The Microsoft OS pushed me over the edge. My Compaq laptop has served me very well for the past 4 years, but over time the OS was just annoying. It would do things I didn't want it to do. I would lose work, catch viruses, and wait for the thing to simply turn off and on. Since I knew I had to replace the laptop, I just couldn't bear to move towards Vista based on everything I have read. There is just no doubt that the Mac OS is more solid and satisfying.
Did I pay a premium for the Mac? You bet. Is it worth it for something I will use for hours almost every day for at least a few years? Of course. Was I willing to gamble on Vista when I could use a competitor that creates raving fans? Nope.
I'll let you know how it is going in a month or two.