If you measure fun as negative frustration, I had a lot more fun with XP than I ever have had with Windows 7. XP was so familiar it melted into the background, and incompatibilities were non-existent. Windows 7 has moved everything around and introduced nothing of value to me personally - my preference would be for XP shell, control panel layout etc. with the Windows 7 kernel and system libraries.

In some ways that's true. Win XP is missing several features.

On the other hand I'd wager that XP has broader support for any driver or program in existence than any other version of any other OS. That's always nice.

As we're seeing, though, that's going to start changing real soon.

I'm sorry, but it is not 10 years old. The original release of Windows XP was late 2001 (9 years ago). Most people are running Service Pack 2 (6 years ago) or Service Pack 3 (2 years ago).

I currently have no reason to switch to Windows 7, but if I do I really really hope I can change the shell to something approximating Windows 2000 and lacking the transparency and pseudo-Dock that they have going.