Copying from the discussion thread:
Favourite moments?
Loki taking the piss out of Black Widow. Granted she got him to spill the beans in the end, but he really did come off as truly menacing in that scene.
Just about everything with Stark/Iron Man in it (with the exception of that unnecessary "it's a one-way trip" scene in the end, because everyone and their dog knows that is not going to happen, so it's just pointless dramatisation). I think the moment where Tony gets the propellers working and then gets that feeling of "oh crap" when he realises that the Cap didn't pull the lever was enough to show that he wasn't afraid to put himself on the line for others. Oh and "WE ARE NOT SOLDIERS!" was simply
.
Hawkeye got the shaft in terms of characterisation, but not when it comes to being a total badass. His assault on the SHIELD carrier showed that even in the midst of superhumans just how dangerous a cunning and tactical assassin can be.
Captain America's quip about "there is only one God and I don't think he dresses like that" was classic. Showed he was old-school both inside and out.
Mark Ruffalo did an excellent job as Banner. I loved the playful banter between him and Tony.
EDIT: Crap, I forgot my favourite (and best) scene of all - when everyone confronts each other on the SHIELD carrier with Fury talking about developing weapons of mass destruction using the power of the artifact, Stark and Cap going "let's take this outside", Thor mocking the puny mortals for their pettiness all the while Black Widow (and deep down inside, everyone else) freaking out about Bana losing his s**t. It was a genuinely tension-filled moment and wished the film had more such instances that showed how unstable this team really was.