I'm just sat at work and was thinking about how good my banana tasted and wondered, why does it taste good to me?

I'm just wondering why I hate so many foods. Vegetables, most fruits with the exception of apples, bananas, strawberrys and oranges, pork chops and most meats cooked like that except steak and chicken, i hate salad cream and mayo and any sauce other than ketchup, i hate MINT, any taste of mint makes me heave (i can just bare with toothepaste..) i hate any type of fish like tuna and salmon unless its in breadcrumbs.. olives, peppers, nuts other than salted peanuts. Its bad