I'm another one who doesn't like 90% of what is served in coffee shops. I only like a flat white or latte, usually with an extra shot. All those syruppy concoctions sound nice, but I know I would hate, because I don't like sweet coffee. I don't mind a hot chocolate apart from it is never actually hot.
I like lots of things and would consider that I'm not fussy at all. I can go into almost any restaurant knowing I will like several things on the menu.
But I do have what seems like a long and quite specific list of dislikes, including:
raw celery, broad beans, bananas
Subway sandwiches
Pizza has to be specific flavour, usually vegetable (peppers, onions, mushrooms, olives, but not sweetcorn), tuna and onion or parma ham and olive. I can't stand popular pizza options like ham and pineapple, chicken, pepperoni or anything spicy.
I didn't think I liked salmon but I do now. That salmon and noodle dish sounds nice, but if I saw it as a vegetarian option, I would be Having Words and I'm not even vegetarian myself.