Vista has some security in installing that makes people crazy who have no patience...Also the protection of the system folders is strong to have less security leaks.
Aragorn wehnt back to XP, I stayed on Vista....and have zero problems.
With every new Windows version people complain that the old one is better... I remember the discussion from Windows 95 vs Windows 3.1, Windows 98 vs Windows 95, Windows Millennium vs Windows 98, WindowsXP vs Windows 98/Millenium...... in the end most people just can not get used to something new and get confused as they can not find their buttons.
Also people are stubborn and try to make Vista look and perform like XP by shutting off the new options.... like buying a new PC and putting back the old video card and processor because the game looked better in low spec graphics.