I've been bitchin about XP for a while so I thought I'd better install the bugger before I'm in danger of loosing my head up my ass and give my opinion..
On the good side...
It installs easy, it boots fast
On the down side....
The GUI makes it hard to dig down and get to the nitty gritty of the OS. Product activation sux. every user is an administrator (unless you change em). makes users idiots. too many nags to tie in to passport.
Overall, if your too stupid to own a computer XP is great otherwise stick to what you've got.

(in my humble opinion)

Jamie.