^I completely agree about the tensions thing. We saw them bicker a bunch in the first film, and I was really looking forward to seeing the dynamics of their friendship(s), maybe how they use each other outside "super hero mode" to talk to each other/get a feel for how to behave in "normal" life, etc. etc. I'm sure there will be some of that with Stark and Banner, but I wanted to see the whole troupe really get closer. Especially considering there might be,
Captain America's death in an upcoming film
I would prefer to see all relationships worked out beforehand.