I got so used to the old way how everything worked in XP that I still have trouble adjusting to Win 7. And I had Win 7 on my PC at work for quite a while already. When it comes to UI I'm megaconsevative. I still had the old Win 95/98/ME theme in XP without animations and rounded corners. So basically I'm making a 15 year step UI-wise now... User access management works a lot better now and there is some other good new stuff.