To go back to XP, been on Vista64u for a few months now and I feel underwhelmed, Vista hasnt given me anything worth sticking with it for, XP on the otherhand will install all my games and play nicely without having to disable UAC, reboot, right click, run as administrator etc etc, its just a ballache, yeah its great for people that piss about with there PC's and break things but I've not broken my OS due to my messing around in years.
XP "Still" just works, Vista has to be tweaked and pissed about with to get it to do the things that XP does out of the box, yes Vista's got its good points but then again so has OSx/Ubuntu or anything else you might wanna install, yeah I know I'm gonna get the usual Pro-Vista fanboi's on here now but I tried it, I didnt like it and I'm tempted to ditch it, been there tried it, going back I reckon......