Fresh install, RC from just a couple weeks ago.
You are right, UAC was much less restrictive, UNTIL my sh1t locked up, I rebooted and it went into psycho lockdown mode. I tried about everything, msconfig, etc but nothing worked but group policy disable.
You should already know I'm not a MAC guy so it isn't like I'm on here just to bash for the sake of bashing. I am also aware of the linux lockdown as well...but at least it's fairly easy just to change over to root once and do whatever you'd like. I had a lot of problems getting Win7 off the ground. That is all.
I hardly used vista and would of skipped it altogether if I could have but it was installed on my new laptop about a year ago.
As for drivers, I had to mess around with a few drivers because I have a fairly new board and couldn't find anything to support 64 bit. For the most part it isn't a bad OS but it does have some annoyances I am still trying to change, like the new task bar crap. It hides my google mail icon (and all others) right now so I don't know when I get new mail or when I should be notified of anything else.
Also had stacked applications, like steam...I have to click the steam icon, then choose my chat window...meh. Like I said, all customization.