So far there's only one thing I've found I can't eat and that's "face".
Ox tongue and sheep's head have a similar texture to me that sets off my gag reflex like nothing else, and so, I don't eat it.
I'm really really really not a picky eater.
I'm not overly fond of everything I eat, but I've always had limited funds and I was raised with the rule of "this is for dinner, eat it or it'll be for breakfast too!"
So, I've learned to eat "everything".
I used to "hate" black olives too, but here's the thing, every once in a while I try out what I know I don't like to see whether I or it has changed.
I was having wine and cheese with a friend called Kali in Sweden and she had grapes and Olives with.
They were DELICIOUS!
Now I love 'em.