Balut I did not like at all. The idea that you are tearing through an embryo just couldn't stop bothering me.
In Vietnam I ate a snake's heart with a shot of its blood. Taste and consistency weren't great but I felt like a fucking jungle king.
The grossest thing I have ever eaten is actually papaya, in Ghana. I was waiting for a bus ("There is no schedule, sir, it comes when it comes" lol) and was absolutely starving. I went to a street vendor and bought muskrat on a stick with sliced papaya. Ate it and enjoyed the fuck out of it and then, after I was done with the meal, I looked over and noticed the woman using the knife she had sliced the papaya with to cut into rotten dead fish. I mean REALLY rotten. Noticed that many of them had been cut before I got there too.
I was sick for 5 days. I actually thought I might die, it was that bad lol.