Best: Mariah Carey's performance - she rocked, and I don't even really LIKE her.
Worst: Sly Stone Tribute - Menage a too many. Sly looked horrified, and Steven Tyler looked like Cher. And the music sucked for the whole 10 minutes.
Was glad to see that Kanye West was limited to one appearance at the microphone - his speech was so not even close to funny, it was painful. And Jay-Z looked like he had no idea what to do when McCartney showed up to sing the last part of "Yesterday."
So there it is, in a nutshell. I liked the Awards better when they were in a smaller theater, and there were more awards given during the prime-time show. But that's just me.