As a semi-professional foodie, I'll try almost anything -- Uni, sushi of any kind, monkey brains, menudo, dried grasshoppers -- you name it. Lots of those things I'd eat again readily. But.... I just can't take raw oysters. It's a texture thing. Breaded & fried, sure. Likewise oyster stew. But not raw.
Massive dislike of boiled okra for the same reason -- slimy texture. Love 'em breaded/fried or split and fried with Amchur in the Indian style.