I'm looking for a specific fic I read forever and a day ago and can't find anymore. It could have been almost everywhere, either AO3, FF.net or the avengerskink LJ.
It's about how Tony notices the strange eating habits of everyone of the other Avengers after they move into the tower with him. I remember how Clint build something like a huge nest in the vents where he hords food. Steve would store any snack he finds in his pockets for later, because he grew up during the depression and was afraid for there being not enough food. I think Natasha was afraid of being poisened and I can't remember Bruce and Thor. At the end of the fic an overtired Tony lets it slip how strange all their eating habits or disorders are, just for them to point out to him that he was the strangest of all of them, since he never seemed to eat anything at all.
It might have been a 5+1 and I don't think there were any pairings, but not sure. Anyone ring a bell?