I had zero issues with Vista. Thought it was pretty solid, but then again I didn't jump on the bandwagon and try to hump MS's leg as soon as they released Vista. I started using Vista about 6 months before Windows 7 launched and there were zero issues.
Lots of driver issues at the start of Vista's release, but that falls on the shoulders of MS and their limited release to software developers so they can learn how to make their drivers properly function with the new OS.
Those that say Vista was bad, I guess it just depends on when they adapted to it. As for Win 8 - you couldn't pay me to use that version, not even 8.1. Same with 11 and with 12, if rumors are true and they're trying to build in their stupid "AI" search engine into it, nope, no thanks. You can count me out.