For the most part, the only reason you received hostile responses is that you snapped back at anyone who honestly answered your intial question (Why Does Everyone Hate Vista?) You asked for their opinion, they gave it, and you said their opinion was worthless. Hardly fair.
My two cents: I dislike Vista. Not for any technical reasons, but for the fact that it just feels clunkier and more obtuse then XP. For me personally, that's important in an OS.
What it boils down to is this choice: do you want a brand new OS that still has a few kinks to work out (like any new OS, especially a Windows one), or do you want a battle-hardened os that has been out for 5 years?
Or, perhaps more importantly, you have a Mac. Why do you need Windows? If its for a particular piece of software, check whether it was built for XP or Vista, and you've solved your problem.
I didn't call anyones opinion worthless. I simply responded to certain people telling them that their answer was not what I was looking for - for the respective reason given in each circumstance. Many people were answering a question that I was not asking, and I felt that I had to clarify what I was asking if people were giving answers to a question I didn't ask.
I need windows because I want to run a number of programs, some of which only run on windows (winamp, smartphone sync software etc), others which run on mac, however I already purchased the windows version and they are very expensive programs and purchasing windows/(+parallels) to run them would be a more affordable option. I've checked into it and there is no "mac only" solution.