I have truly enjoyed running windows 7. In my heart of hearts, I'm a windows 2000 with a touch of NT 4.0 kinda guy. We still use XP pro in all the offices since most of the software vendors aren't windows 7 ready yet, but they are getting there.
I've had no problems with Windows Vista, as it's been on my laptop for 2 years.
I think that if I take care of my systems, they take cate of me.
In all my years of working with windows, I have never lost any data nor have I been infected. I've seen it happen, of course, but diligent users don't seem to experience that, I have found.
I'm glad that Microsoft is reporting record numbers, in spite of all the commercials and arguments against it. Apparently they're doing something well enough to counteract that. The proof is in the pudding.