I really dislike only one thing; everything that comes out of bodies of water. So, fish. Any kind. I'll eat pretty much anything else (that's food obviously), though I like some things more than others.
I will say that, randomly talking about fast-food chains now, Kentucky Fried Chicken is terrible. It's already a bad sign when you have the word "chicken" in your name, yet McDonalds makes better chicken nuggets.