I like how people summarily continue to slam Windows Vista as being an unstable, unusable PoS, ignoring the fact that Windows Me existed, Windows 2000 had a rocky start in the beginning, and Windows XP wasn't any better until SP1 was released. In fact, Microsoft's only less-than-rocky release would probably be Windows 7 (and Windows 98, but I was too young to care), which is just Vista with UI changes. And really, Vista SP2 is a viable operating system alongside Windows 7, and might as well be Windows 7 without the GUI changes.
And I used Windows Vista as my main operating system from November 2007 until Windows 7 RTM was available through academic channels (about mid 2009). Never really had a problem with it. If anything, after some insight on OS's in general, Vista revealed that a lot of Windows programmers were, for lack of a better word, idiots.