My favorite all-time sandwich is one I make myself at home:
Toast a Thomas's English muffin and smear both sides with a generous amount of real butter. Fry two eggs over easy and three thick slices of bacon. Add two thick slices of swiss cheese. Slap it all together and make sure you have some napkins nearby as the egg yolks will dribble all over your hands. But so good.
Swap the Swiss out for some Tillamook medium cheddar and you got yourself a deal!