Debbie Moon at 2012-06-16 18:28:04:
Well, I'll start us off with the obvious one, from The Avengers...
Steve Rogers: Big man in a suit of armour. Take that off, what are you?
Tony Stark: Genius, billionaire, playboy, philanthropist.
No actual clip yet, but the exchange is in this version of the trailer:
http://www.youtube.com/watch?v=1hPpG4s3-O4