I have never eaten Possum though my grandmother did say it was delicious. She lived in Oklahoma for a few years when she was young and remembered it with gravy and biscuits. This same woman would not drink anything from a green glass nor would she eat chicken in any form other than stock in another dish.
I've eaten 90% of everything that's been listed here, but the strangest and probably worst thing I've ever eaten comes right out of my backyard.
Mullet roe has got to be the line I will not cross again. Gross.