If I have to eat fast food, I typically stick to whatever is cheapest. If I want a quality burger, I tend to go with the 2/3lb Double Thick Burger from Hardees/Carl Jr's. I figure if I'm going to kill myself, I might as well do it with a quality burger. That, or I'll head to Penguin Point
and get a grilled tenderloin w/ shredded cabbage, tomato, and some speciality sauce of theirs. But the big draw for them is their fried chicken - which, oh god, just completely blows KFC out of the water. It's off the charts good.
Though I haven't eaten at a burger joint in several months. I only eat hamburgers usually once or twice a month - and I make them myself since corporate policy and the law doesn't allow them to be made the way I like them. Damned near raw. Like, still bleeding raw. As long as it's warm in the middle and done on the outside, I'm happy.