I am a fairly adventurous eater, and not everything has been a favorite. A Russian grandma once loaded my plate with cold slabs of lard doused with her homemade hot sauce. Cold lard was not great, but the hot sauce was flavorful and I cleaned my plate.
The only two things that I consistently do not like are honeydew and cantaloupe. Most folks seem to love them, and I try them every few years just to confirm, but there is a sickly-sweet taste that puts me off.