Not sure if this has been done before but wanted to see myself - In my order:
1. Iron Man - Robert Downey IS Tony Stark
2. Thor - Chris Hemsworth does an amazing job, but not as integrated as I thought he would be...
3. Hulk - This is the best Hulk-movie incarnation ever
4. Hawkeye - Joss did a good job explaining WHY the hell a dude with a bow n arrow would be on a team of heroes out of his league
5. Captain America - I dunno, like some people, not too good on Chris Evans as Cap - The whole movie the camera just tried to get good angle-shots of him, showin' off his profile
6. Black Widow - Just never liked her - BUT, she was better in this movie then IM 2 and Scarlett has some amazing stunts as well