Two for me: coffee and sushi.
I didn’t start drinking coffee until I was in my middle 20’s. When I tried it as a younger person I didn’t like it because it was so bitter. It wasn’t until I was on a cruise (with my wealthy extended family) I had a fancy boy cappuccino and I was like “hot damn, this bitter water is actually good!” Now I drink at least 4 cups of coffee every moring.
I tried sushi in my teens and absolutely hated it, I remember gagging at the taste of the raw fish. Like coffee it wasn’t until years later as an adult I tried sushi again at a Japanese place in town and I was like “damn, this raw fish is really tasty!” Now sushi is a regular staple takeout food for me.
tamarind. Pico de gallo. raw tomato. black coffee. Grits. Fried okra. Pinto beans. Wild rice. Avocado. Horchata. Nopales. Tripas. Barbacoa.
I’ve also had some things I’ve gone the other way with. Can’t stand eggs, any style. Or ketchup. Or milk (the smell of milk makes me nauseous). Fish- raw, cooked, whatever.