Don't forget the clean, elegant, nice new skin included with MC 12. I think it really captures the capability of the computer by adding really nice fade features which Vista promises to deliver--I really like the top right button fades. Transparent menus are great. Don't forget the extremely fast interface. iTunes used to be my favorite but it gets really slow really fast. Thanks for the incredible speed bumps!
I find new features all the time...some were already there, but wow! MC has a lot of features.