Pineapple on pizza. I used to hate it as a child since the fruity taste seemed weird on it. After a deep introspection, I came to accept that it's still food and the taste ended up growing on me.
Oh, but I still put ketchup on pizza, with pineapples or whatever on it.
It's just something I never grew out of. I need it to soften and enhance the taste of whatever I'm eating, mostly meat or fried dishes. If I don't put it on the stuff I usually eat, then eating food feels like a chore and tastes kind of bland.
Not that I put it on everything I eat. Just that I use it on a lot of the stuff I eat.