There's something about burgers that someone else cooks that appeals to me. I can make a decent, maybe eve very good burger, but I find that I usually like it when someone else makes my burgers.
Best , or most memorable burgers I've had come from local bars... I don't frequent bars these days and some of my fondest ( maybe only truly good memories ) of bars were a couple lunch time meals when we would stop in from farming and get burgers for lunch at a local bar. My home town bar, had some of the best... cooked on a flat top grill, with perfect thin crust on the surface of the burgers. However what made them so great ( aside from just being really hungry and someone else cooking them, was the onions on them. They would slice a onion about 3/8" thick and grill that along side the burgers and place that on top of the burger, along with the toasted bun... I'm generally a catsup, mustard, onion guy at heart... and those bar burgers, that's all that was on them... ( I don't care much for cheese on burgers ).
Anyway, I can enjoy a wide variety of burgers. Every now and then , I just gotta have a Big Mac... then recently I had one of my all time classic meals at McD's... 3 regular burgers, fries, and a coke. Call me crazy, but sometimes, that simple little classic McDonald's burger really hits the spot ( well 3 or 4 of them anyway ).
I do love mushroom, onions, and swiss... with a little A1 sauce too.