I'm with iggy23 here - I have been using Vista since mid Feb and sorry, but I have to say - I LOVE it!!! 

I love the way it looks, it is fast and I haven't had any problems with it. All my programs, including Poser 7, PSP-XI and Vue 6 run fine and perform really well.  

There are issues with it - especially with drivers. Some of my older programs are not compatible with Vista so I will have to wait patiently for a new version or patch to resolve this. (I used XP right from day one too and there were issues with it when it was first released but now most people seem to be happy with XP).

The UAC is very annoying, but it can be turned off - it is up to the user. However, rightly or wrongly, this is a major part of the security for Vista. We always complained because earlier Windows weren't secure, now we have security measures in place and we are complaining...  

I haven't had any issues with DRM either - but of course if I had, I guess I would be upset about it.

So, the "I Love Vista" people are few and far between, but I am really happy with it. I use XP at work still and it is so flat and dull in comparison.