Interestingly for me, I think Win7 is the first time I've sat here after a month of use and when going back to the previous version of windows (Vista in this this case), haven't thought to myself, "Gah, I just can't stand to use the previous version anymore."
In fact, after getting everything setup, I'm left wondering why I upgraded to Win7? It's nice certainly, but feels exactly like Vista in almost every way with minor differences. Some are better, Show Desktop for instance. While some are far far worse, Windows Explorer for instance.
The installed size is smaller, that's nice I suppose. But with almost 6 terabytes of space on my desktop, a few gigabytes isn't all that.
So far, I'm basically recommending to friends and family that they either stick with Vista if they already have it, or upgrade to Win7 if they are still on XP.
One thing I particularly miss is the Vista Ultimate extra Dreamscene, I miss my animated desktop.
Regards,
SB