I had Vista when it first came out. I never thought it was total crap, but it was more cumbersome than it should've been. They screwed up the user rights. Not every little thing you do should have required UAC. Plus, while I didn't have this problem, they should've done more with hardware compatibility.
The way Microsoft has positioned Windows 8 is just moronic, as far as I can tell. One version for the desktop, one version for tablets, and don't mess with the frigging Start Menu. Seriously, how hard would that have been? Now you've got millions of users for whom Windows 8 is a joke, because they don't have touchscreen monitors on their PCs, and worse, they put out two different versions of Windows 8 for tablets, one of which is just slightly less useful than a Cracker Jack toy.