I cannot stand seafood or fishy-tasting things - the smell alone makes me feel like I'm about to vomit. I'd be willing to give it a second chance but honestly here in the Midwest I'm convinced that any and all seafood is rancid by the time it reaches anyone's dinner plate. I did try a few small bites of tilapia a few months ago, which was tolerable soaked in lemon juice.
I also have a thing with raw tomatoes, tomato soup, or anything that tastes generally "tomato-y." Fresh salsa is fine, spaghetti sauce is fine (as long as it doesn't taste strongly of tomato), ketchup is fine. Raw tomato is not fine. I've tried it a few times recently and every time I immediately gag and want to wash the taste out of my mouth. Yet dice it up, add some onion and cilantro, and it's yummy. Go figure.