*shrugs* i like xp
but you have your choice of 2k, xp, nt
so if you dont like xp use 2k and vise versa =p
personally i've never had any compat problems with xp but then all i really use is norton 2002, nero 5.5, q3, and some shareware apps that are usually updated often (winamp, gamespy, irc, ect). of course using the latest drivers and all that good stuff ;-)
i use my machine mainly for gaming so i dont have a lot of stuff running at the same time (so save bandwidth), and xp hardly uses much of my 768 ram (maybe 166 or a little more at times?)
although i can see some people reason's for not wanting to update due to older [unsupported] hardware or certain software compat issues or buggy drivers