My Vista Fun and larfs
The most annoying thing about Vista for me is the way device drivers work - it is just as bad as in all the other versions of Windows.
In my setup there are two pieces of hardware where the manufacturers have decided they won't be producing drivers:
Creative Soundblaster Live
Some Epson Scanner (don't remember the make exactly, but it is about 3 years old and came with a device for bunging slides into to scan those).
Now I can see the execs of these companies rubbing their greasy little paws together at the sudden need people may find to replace perfectly good hardware for other hardware which does exactly the same thing and with probably exactly the same components.
The main reason for this IMHO is that whereas Linux drivers are done by Chipset (so hardware based on the same chipset as other hardware has a fighting chance of already having a compatible driver), Windows is done by product. To make matters worse, Vista wouldn't let you install drivers which aren't certified by Microsoft, so you couldn't even write your own (if you were so inclined).
Well, my response was to not bother using Vista except to check if Halflife 2 was stable with the latest NVIDIA graphics driver (which it wasn't last time I checked). I think I'll just stick with Ubuntu for day to day stuff, XP for games and Vista for when I really want to see a window manager which isn't anywhere near as good as Beryl but cost infinitely more.
And don't even get me started on the environmental impact of having to replace things which ain't broken ;)