I had to buy a newer model Logitech to run on Vista, which is fine, because the old one didn't run on OS-X Leopard, either (which I run side-by-side with Vista Ultimate). The new 900 Logitech cam runs fine on both.
I prefer Vista over Leopard. They both use about the same system resources but I've found Leopard isn't as stable nor does it give me as many configuration choices as Vista (but, then, "choice" is not a leading Apple feature).
There are a number of OS-X behaviors that I find annoying but I mainly use that box to render videos while I'm using the Vista box for other stuff and, for that, it works OK.
I think a large percentage of bad perceptions of Vista comes from word of mouth and not actual use. This seems to be borne out here:
"Vista's fault" seems to be the technology equivalent of "Bush's fault".