As an American, American "cheese" (including single slices, and things like spray cheese) fucking suck. Give me a good pepperjack or white cheddar on my burger, not that processed shit.
Yup, I don't buy those singles or anything adjacent to them, but I do like a variety of American cheeses. Jack cheeses like Pepper Jack are absolutely American and work really well on burgers and grilled cheese sandwiches.