This general question is spurred by a current thread of hamburgers that aren't the same quality when you order them for takeout.
Some foods do "carry" their essence off premises better than others. One of my favorites is PHo from PHo 75 on Adams Ave. The reason the soup is almost as good when reheated at home is how they pack it. Hot soup, with a little meat is packed in one plastic container with a tight lid. Cold part of the soup--the noodles, most of the meat, all of the spicing, the bean sprouts,basil and the limeis packed sort of cold in another container--paper box I believe.
When you mix them at home to reheat, the only harm done is that the noodles tend to clump a bit. Taste just as good though.
Any other hot foods you've had good luck with getting for takeout? Like chili, maybe. That's something that doesn't suffer from reheating at all.
I've had trouble reheating pizza and Chinese Food to some extent.
TAkeout cold food like sushi and sashimi would be divine.