I wont actively refuse to eat anything - however I don't particularly like pears or tofu or marmite.
However, if at someone's house for dinner and they offered all 3 I'd eat them.
I will also, try anything at least once, sometimes more than once to give it a fair go. So far the 3 listed above are the only things I don't enjoy. Otherwise, I like all foods. Even frogs legs, snails, veal, liver, and other supposedly "weird" things...
Actually, I actively will not buy or avoid to eat fast food / takeaways / poor quality highly processed or refined foods / ready meals - in fact I can't remember ever buying a ready meal. However as individual food items, as above really.