I was around 8 years old and flew with my folks ORD-MIA on a late night flight on a 747. The plane was very empty and I ran up and down the aisles a lot.

Up to that time, the only kind of sandwiches I would eat were PB&J. Of course, the didn't have PB&Js on the plane, but they did have ham and cheese. So I tried one and liked it, and allowed my mother to make them for me subsequently.

Perhaps one of the few times airplane food has expanded someone's food preferences.