Food I've pretty much gotten over, I think. I don't really miss all that much that I can't replicate here, except maybe New Jersey diners. Can I bring one of those?!
I think I might bring back a bag of Cherry Twizzler Pull n Peels, but I'd probably eat it on the plane!
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It's mostly non-food stuff that I would bring back, like Secret deodorant, Noxema, and Curel moisturiser.
Although, on second thought, I do tend to plan to bring back a 6-pack of some really nice craft beer, like a pumpkin ale. Mmmm mmm mmm.