The only one I can think of isn't a member of my family, it's one of my kindergarteners:

Everyday in the cafeteria he orders the pizza. He refuses to order everything else.

If it's cheese pizza he wont eat it. He'll only eat it if it's pepperoni pizza, but he takes off the pepperoni and eats that, then eats the now cheese pizza.

Kindergarteners are strange creatures.