I have celiac disease. I have had to give up a lot of foods (as an adult) that I used to really like (anything w/ wheat, rye barley or oats). There is talk around the celiac community about tastes changing over time. When you first start the diet a lot of foods seem really bland (for some reason a lot of foods that are made gluten free also seem to be free of seasonings. ) But people are told to keep going with the foods and to try new foods that they didn't like before. You get to liking new foods that previously you did not like. As it is adapt or don't eat. When I was a kid I had a very small palate (though liked almost any raw fruit or vegetable). But now it is a lot larger. Now if I could just enjoy cooking. Though for that onion thing, I still hate onions and don't think I will ever like them. They still seem too strong.