Despite having a dedicated fanbase, many people dislike the combination of sweet pineapple with savory ham, making it one of the least popular choices for some.
Anchovies are a love-it-or-hate-it topping. Their strong, salty flavor often puts off those who prefer milder or more traditional pizza toppings.
While it's popular in some European countries, tuna pizza is not widely embraced elsewhere due to the fishy flavor not appealing to many pizza lovers.
A pizza loaded with vegetables like mushrooms, bell peppers, olives, and onions can be less popular, especially among those who prefer more traditional or meat-heavy options.
White pizza, which is made without tomato sauce and often includes ricotta cheese, garlic, and olive oil, lacks the familiar tangy flavor of tomato-based pizzas, which can make it less appealing to some.