Ok. I have been completely sucked into Avengers fanfic. It is my new obsession, and not event he new season of Metalocalypse can divert me at all. So I have been reading and stalking as many good stories as I can find, and this one is one of my all time favorites.
In Which Tony Stark Builds Himself Some Friends (But His Family Was Assigned by Nick Fury)
http://archiveofourown.org/series/18228 I can not help but to burst out laughing at least twice in almost every chapter. This story made me love Tony Stark as a character when I was previoulsy kinda eh about him. Even if you do not read any other Avenger fanfics, this one is a must read, especially if your are having a somewhat down kinda day.