The first questions that comes immediately after the lecture of your comment: HAVE YOU EVER TRIED/INSTALLED VISTA?
Let me tell you my answer to your 10 points (and I have installed Vista on two different PCs - and soon more...)
1. Correct, but works also nice with 1 GB.
2. False, I installed Vista over XP and XP runs just fine - of course on different partitions :)
3. The whole Adobe CS2 Suited runs on Vista, the problem is that Adobe doesn't offer support for it. Other programs runs well on Vista, except most anti-viruses and software that installs deep into the system. I used even some XP drivers for some hardware on Vista. Anyway, this point is going to change much in the future... and think about switching to x64.
4. What you read from the websites is a collection of bugs. If you will install Vista you will not see all these bugs. Anyway, this can be changed and I believe Microsoft is working on it.
5. That's not anymore a problem. It was some years ago.
6. You have to try first and then I will listen to you.
7. OneCare is not included with Vista. You can install third-party antivirus software.
8. If you don't like it, you can disable it. Others (the majority) likes it.
9. You have to wait at least one year to make this affirmation. If somebody says so doesn't mean it is true.
10. Same as point 6.
My advice: when you read something on the websites make selections and don't believe everything.
Personally, especially on Vista subject, I was impressed with the number of the negative subjects on it and that was what pointed me more to try it. | 
There is nothing in Vista that warrants an upgrade at this time. I have been hearing this phrase a lot lately. And it is one of the reasons that contributed to Windows Vista's muted reception following 
