I don't usually eat them unless I'm at a baseball game~!
In which case, my favorites are ketchup, mustard, relish, cheddar cheese, and bacon bits!
Buuut these days they almost never have the cheese or bacon. ):
When I'm at home, I just go with ketchup/mustard/relish if I have all of them... x) Too lazy to go through the whole cheese and bacon ordeal!