Oh man, I loved the build up in this - from their odd beginning, to her settling into surprising routine, to the end, with Pepper wishing for all the things that frustrate her about Tony to return, if only to assure her that he's okay. Subtle but totally, utterly heartbreaking.

Also this:

The man was a prima donna, a gigantic slut, and a mad scientist to boot...

Needs to be a t-shirt. SO BAD.