As far as burgers I've gotten from a restaurant, there was a bar on Broadway in Nashville, I can't remember the name, but it had sort of a trailer park theme, not sure if it is still there or not, I was in town for the solar eclipse a few years back and the pandemic wasn't kind to a lot of restaurants. I don't know exactly what they did, I don't remember there being obviously outstanding about that burger, but it hit different.

That said, I really like my own burgers. Coarse ground chuck or brisket, salt and pepper. Preheat a griddle on the grill on high, smash the burgers on there as flat as you can get them. If you're feeling frisky, spread some mustard on the patties and do them animal style. Throw a slice of cheese on towards the end of cooking to get it good and melts, there aren't many cases where I think American cheese is called for but I think burgers and American cheese are the perfect match, but the top 2 runners up for me are muenster and cheddar. Serve with mustard, ketchup, mayo, and pickles, maybe tomato and onion, sometimes bacon, or occasionally a fried egg.

It's not everyone's thing, but I'm also personally a fan of peanut butter, jelly, and bacon on my burgers.