Things you add to food that others may not?

So as I eat this wonderful burger of mine I am wondering what people put on their food that some would consider weird or just out of the ordinary.

My example would be this burger. I haven't met anyone yet that adds Mayo + Mustard + Sour Cream to a burger. The buddies I told said they'd never add sour cream to a burger which I get, I used to relate it to mexican dishes. Now I just try it on anything I feel it would taste well with.

Another one would be Mustard + Mayo + Ranch for making potato salad (plus the other standard ingredients). I think it's a pretty nice combination because it can easily adjust to fit what you like. I for example dislike mayo so mine is very slightly more towards mustard. The ranch and mayo combination fits really well together.