I tried vegemite once. It wasn't for me, but it seems to be a fave with the Aussies…at least according to American media, which routinely reinforces stereotypes like the English having bad teeth, Germans being frightening, and American Chinese restaurants serving dog.
I watched an episode of Chopped where one of the mystery ingredients was cricket flour. I had hoped that maybe it was flour that cricket players use on their bats when they don't have talcum powder, but nope. Flour made from crickets. I suppose I would eat it, but it does strike me as an odd food option. Might be the best option in some places.