I never liked XP... It was a step back, functionally, from Windows 2000. It was certainly better than Me, and was more 'stable' than 98. But it was slow and clunky... Not until we got dual core chips and 4 gigs of RAM did XP start to run smoothly... Everything was just a little quirky in XP. Drivers, WiFi connections, the Blutooth stack...
Windows 7 is awesome. It is as close to 'just works' as Windows has ever been. Its faster. It has a cleaner interface. Drivers install automatically 90% of the time. Connecting to WiFi works, out of the box.
The only advantage XP has over Windows 7 was the missing 'Up 1 Level' button in Explorer...
XP needs to die. Just like Flash.