I can bring up a (not). Tomatoes.
Every damn time someone finds out I don't like tomatoes they go on and on about how I just must not have tried fresh ones or tried them in the right food or some other baloney. I don't like them. I never have. I never will. It's as much psychological as it is taste and it's mostly texture anyway. Every once in a while, someone thinks they can sneak them into something and I'm gonna be so surprised and thankful that they have enlightened me. It never works. And it always pisses me off.
My mom (and dad) came from the 'clean your plate' school of feeding children. I get it more now that I'm a dad. Looking back, I see all the signs about how tight money must have been and how hard mom must have been working to get the most out of the food budget. I can also see how any food going to waste in the garbage can would have felt to them. For most foods, it didn't have horrible consequences. You might not like green beans, but you could suck it up and force a small serving down. But tomatoes.... for me and my two brothers, were a different story. The texture of the tomato just made us all gag. Not just don't like the flavor, but physically start to gag. I have no doubt psychology played a part. We got ourselves worked up. And I get how it must have looked to our folks, like we were being overly dramatic (which we could be on occasion). Maybe all of that was true, but it was more as well. Anyway, I remember more than one night where the three of us sat around the table with nothing but a slice of tomato, or chucks of tomato from a salad sitting on our plates. We couldn't leave the table until we finished them. Eventually, we would force them down. More than once, we threw up immediately afterwords. (I'm convinced my mom thought we were faking that at the time.) Once, my brother spent all night at the table and went to school the next day without breakfast (because the tomato from last night WAS 'his' breakfast). It turned into a weird contest of wills between our mom and each of us. This is the only part of my relationship with my mom that went like this, so there must be more too it from her end as well. Anyway, to this day I cannot stand any piece of tomato large enough to have any tomato texture. And I'm not a big fan of things that are too 'tomato-ey' either. Ketchup, fine, it's something where the tomato is so processed, it's not recognizable. But marinara sauce can be too chunky and I won't like it. Same with a pico de gallo. Salsa can get 'blended' enough that I can eat it.