The Avengers was the best of the Marvel movies yet. Damn was that good. Also I'm with Kender on shipping Thor and Loki. Some of the moments they had in that movie, they looked really hot together.
My favorite of the characters is Tony Stark as played by Downey, though.
And I don't get the hype on Scarlett Johansen the internet is making. She's not particularly attractive (in my opinion), and her character is too meh/too reinforcing of gender stereotypes. I mean, her "superpower" is being seductive/manipulative.