I like IE7. A few days ago, being too brave maybe as usual, I decided to instal it on my dev box and in a few days I succeeded to develop dangerous addictions for several things. First, on tabbed browsing (pretty fast given that each IE window is a separate process - and opening a new tab is instantaneous). Second, I started to use Integrated search more and more.
I can't explain why I become addicted now on these features. After all, they were present in the MSN toolbar also. But I guess the speed matters. When a new tab opens in 0.1 seconds (as opposed in 0.8 seconds) then you get a different "feeling" on how things work.
Anyway - one thing is sure. I can't go back to IE6... 🙂