Probably Cheeseburger...I can go with something like Burger King or McDonalds sometimes, but nothing beats a Burger made by yourself -> Juicy Patty, Crispy Bun, fresh tomatoes/lettuce, sweet fried onions, melting cheese and a simple, but tasty sauce...Heavenly Combination.
I make burgers myself once a week ever since I bought Jamie Oliver's burger press. I use fresh ground beef and spice it and fry it to my likings. I now always have a craving for my own burgers lol.
I don't like raw onions on my burger unless they are finely diced. No tomatoes. If lettuce, then shredded only or not at all. Lettuce is only a filler on a burger and doesn't really add anything to the flavor. Lots of people dislike mustard on burgers, myself don't mind. I can do with or without. Pickles can distract the burger's flavor, and bacon is not always a must. I actually like American cheese, but Swiss ain't bad either. Before frying I jolt the patties with a few shots of Tabasco or hot pepper sauce for flavor enhancement. I also salt and pepper the patties surface only, never mix it in the meat.