I like my burgers to taste like a burger not a meatloaf. I Patty the ground beef usually 80/20. I use season salt, fresh ground pepper, Wooster shire sauce, and some kind of seasoning that a local high school was selling as a fundraiser. It reminds me a lot of Shapley‘s seasoning. My wife likes when I put Montreal steak seasoning on it. All the seasoning goes on the outside of the meat, I do not mix any in with the patty. For me a simple burger is a better burger . Cooked medium well because I don’t like a pink burger. Ketchup, mustard, mayonnaise, pickle, onion, lettuce, and melted American cheese. All on top of the bun of your choice. I prefer a toasted onion bun, white bread bun, or a Kings Hawaiian roll bun.
You can put all kinds of stuff on top. Bacon, blue cheese crumbles, sautéed onion, mushrooms, different cheeses, sausage, fried egg, etc.... it’s all in what you like.
For reference on what a good burger looks like, look at some of IMPP’s threads...