As to Delaware, this is the only state about whose people I don't even have a vague idea, even though it has made the front pages quite often over the last years owing to the CumEx-Files scandal. I'm not even as unfamiliar with Rhode Island as I am with Delaware, thanks to Family Guy. Even though it's merely an animated sitcom, it taught me about the characteristics of the state and the nature of its people. But when I think of Delawareans, nothing springs to mind.
https://www.youtube.com/watch?v=TK_FiRm6ZK8