I was made to have Vista at work , I went kicking and screeming as I wanted XP but it was that or I had to keep the old 10gb Old computer. In all fairness I have had no problems at work using it , but when I put together a new Pc early this year even the shop I bought the bits off said they are staying with xp until they are forced to by M/soft.., So I will keep my XP pro until either they get all the bugs sorted or something better comes along..
As martin says you should NEVER "use any Mirosoft Version 1 software" especially when they announce before they actual release Vista that they also announce when they will launch the 1st service pack !!
Xp may not be brilliant but it works (Generally)