Earthworms are great survival food. I can choke em down, but I know a lot of people (americans in particular) would die of starvation with worms in front of them because they couldn't get their mind around eating them.
I'm scared to say the things I've tried but I've always followed the "when in Rome" philosophy. I have been living and working in China for over 15 years and I've tried everything... Some things were pleasant surprises as far as flavor goes.
Balut, fertilized and partially formed duck eggs. Taste just like regular egg tho just a little crunchy. You can see the baby duck fetus though if you pull it out of the shell. Filipino thing