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.
Sushi was a big one for me as well. I think I first had it in 5th or 6th grade, and I was SOOO excited to try it because I was a little weeb. Once the seaweed from a california roll hit I definitely gagged and probably didn’t try it again for another 5 years or more.
When I was growing up my grandpa cooked for the household. He was born in like 1930 I think so it was like, plain pork chops, white rice with butter, and iceburg lettuce salad with shredded carrots for dinner. So I wasn’t really exposed to a variety of foods at all. When I moved out though I went all out trying a bunch of different veggies I’d never heard of and cuisines I had never tried and I’m so glad I did