I have to agree, I'm a huge fan of Win 7. It just...makes sense (for the most part).
I think my favorite feature is the search indexer (which works). Basically, you can set windows up to maintain a database of all files on the system, allowing you to very quickly search for anything you need from a box on the start menu. As you type your search string, Windows displays the results almost instantaneously. It's really, really nice.
Still not a fan of UAC, though. That's the first thing to get shut off.