Chicken. I loathe chicken, always have, always will, in all forms. This makes life occasionally difficult, as this is the default for people who need to feed a lot of people, because "everyone likes chicken!". See: airplanes (back when they served food), weddings, award banquets, large parties. If given the chance, on a RSVP card or some such, I usually pretend to be a vegetarian.

This can also make family meals difficult. I spent a lot of my childhood skipping some dinners and making my own for others. My ex-husband and I eventually worked out that chicken and pork are usually interchangeable in recipes, so we just cooked both in the same dish.