The one reason I discovered I like it, and am now running it on my gaming box is due to the watchdog processes it has. Under 2000, ATI Driver locks would result in no good information. XP, something kicks off when it sees the driver stuck in an inifinite loop, and it captures all kinds of info and lets me know what happened on reboot.

I still despise XP, and have a long list of things I change on a clean install, but the evolutionary features have gotten me to switch. I'm still on track for an OS X migration elsewhere for my computing needs though.