1. Gravity- Al though visually and sound wise this movie is absolutely stunning, I found the story to be quite uninteresting and failed to impress me overall, did not care too much about the characters either. The ratings and hype this movie received is absurd.
Did you watch it in the theathre or at home? I imagine I won't think much of it when watching it on dvd/bluray eventually but in the cinema, I found it to be a completey unique and immersive experience. Really felt like being in space.
Also don't agree with Avatar. It isn't rated that highly and I actually think it's a pretty decent story, even when watching it outside cinemas.
The Shawshank Redemption: It's a good movie but nowhere near what it's being made out to be.
Godfather 2: I know I could get crucified for saying this but while I love the first one, the sequel is a complete bore. So, so long and the side story with De Niro as the young Vito is unneccessary.
Inception: It's a good blockbuster movie, just not as good as it's been made out.
Chinatown: I was extremely surprised and disappointed to find this rather boring. I had been looking forward to watching it for years.
Forrest Gump: Very sweet and feel-goody but how it came to be the classic it is, I don't know.
Oh, and
Crash is downright terrible. Probably the worst Oscar winner for best movie ever.