For me, this question is a no-brainer, I do not have to choose something or think about the answer.
Popcorn. The old-fashioned kind. No flavored coatings! I never want nacho, white cheese, hot sauce, sour cream & onion flavored popcorn.

Theater popcorn (no extra butter) is my favorite. The popped in a pan on your stove runs a close second.

I would kill for a large fresh batch right NOW!.