In particular, I've grown to dislike shrimp. My mouth waters for some good crustacean food no matter what, but the bulbous texture of shrimp alone triggers some kind of mild allergic reaction in my lips that makes them inflame. Therefore, I'm not certain if they're even tasty to me anymore, and I would rather not experiment with them any more.
Onions and various non-pumpkin gourds are starting to make some headway on me. The former vegetable I've always had trouble with because of its insidious bitter taste, but it adds a lot of crunch to beef stew, soups, and other stuff where there's already any overriding tastes and colors arriving on my tastebuds. Gourds, to me, are the true dessert fruits, with this super-sweet and rich taste that I like a lot. But, nevertheless, I avoided stuff like squash and onions for a long time. Still do not like tomatoes (too sweet!), haven't tried any eggplant recently, and I'm not interested in peppers of any kind.