The thing I've really found annoying when I've used Vista is that you just can't move around in it in the same way. They've taken away the little icon up the top that allows you to move up through different levels.

And there are too many changes in things like word that just seem chgaes for the sake of change. At times it's a bit like driving a new car where they've reversed the positions of the accelerator and the brake, or playing a left hand strung guitar.