I like vista too.
Nothing too wrong with it. I did wait until I bought a quad core to run it on though :) But it runs on a lower spec'd laptop just fine too.
Don't have a problem with the UAC either. It pops up once in a while when installing stuff, or tweaking some settings, but that's about it.
On linux you have to sudo, su, use yast, or similar ALL require passwords...
On my mac you have to type the password in when installing stuff tweaking hardware...
So pretty much the same on all platforms.
The other thing people berate MS for is the big patches stroke service packs... Well the first thing my shiny new mac did when I switched on was download 480MB of patches, and something similar has happened with all the linux machines I've run in vmware... suse, ubuntu, mandrake.
Oh, and software compatibility.... Some ancient language learning software I had win 95 era... ran fine on Vista... tried the mac version on my mac..... no such luck... That's what happens when you change APIs and platforms all the time.
Oh and lastly... hardware support... My Uber multifunction printer works fine with Vista, sort of works with MAC but their configuration GUI is pants... and linux..... well you can forget using the very useful multi-sheet double sided auto scanner.
I'll fetch my coat.