Our taste buds generally become less sensitive as we grow older.
“Your taste buds are actually replaced about every every two weeks! Most children have about 10,000 taste buds but as they grow, some taste buds stop being replaced. Adults often have about 5,000 working taste buds. This explains why some foods taste much more intense to children, and the decline in number of taste buds makes more foods palatable to adults as some food’s intensity isn’t tastes as strongly (Oureverydaylife).”
Also the memories associated aren’t the same. Maybe you associated eating certain foods with family, after school, or during a time that you may look back today with nostalgia.
That’s my best hypothesis. Recipes may change a bit, but I think it’s more both psychological and physiological.