Now this is a comeback. After all the trouble with booze, drugs and (was there?) a drunk driving charge, former heir to the serious-actor-slash-matinee-idol throne Robert Downey Jr. shows he still has what it takes to wow audiences. This may even be his blockbuster-est movie yet. What could've been a hokey let's-turn-over-a-new-leaf story was more believable from across Downey's eyes (the same ones that made you cry in Chaplin).
the other nuts: Jeff Bridges - Whoa!!! I didn't think he could be that menacing, in a very human way, too. Made it more disturbing. Gwyneth Paltrow - Never liked her much but she was woefully underused here. Maybe they have plans for the second.
and my super squeal moment: yes, nick fury and s.h.i.e.l.d.!!! i clapped my hands like a giddy kid shrieking "whoo! nick fury and s.h.i.e.l.d.!" while remembering how fun it was to geek out over comic books with my brother when we were younger.
that's all, you guys have already said everything else :D