Sliced bread. It's horrible, the worst thing since bread.
I don't even like it when the bakery I buy from only has a sliced loaf left even when it's the same one I buy just pre-sliced.
Eggs,
Milk except in tea/coffee,
Seafood, insects of the sea 
Chinese take away,
Chicken nuggets,
Custard,
Bananas,
Rotisserie chicken, often recommended on MN. It's just so sweaty and greasy,
Cereal,
Ketchup,
Brown sauce,
Fruit,
Plain pasta, it simply shouldn't be allowed,
Wet ham,
wafer thin ham,
wafer thin chicken,
Burgers from McDonald's I ate them without enjoying them for years for convenience but no more. Fries or cheese bites and a coke all the way,
Mushrooms but I'm not sure they are really popular.