As a Dutch person, a bit off topic, but some truth in television that I found funny:

The Belgians' relationship with fries.

Last summer I was at a former military camp in the German hills, managed by Belgium when it was still operational, and we had a Belgian tour guide who'd served in the camp when it was active. He joked that the Belgian conscripts serving in that camp still got fries thrice a week, or they'd have a riot.

The lack of a feeling of equal opportunity the secessionists all have for each other. If one group has the right to leave, I'd think all do.

The thing I understood the least about the Czechlands is why Czechoslovakia didn't have one identity (for a lack of a better way to put it). Like it always seemed like a compound of two places, as opposed to a singular distinct body.