The Dirt Rag Burger is my absolute favorite. Hands down. It comes with cheese pickles and homemade Wholey's peanut butter. I've had a burger similar to his other places and they just can't touch OTB.
My second favorite is Heaven on Earth with mozzarella, roasted red peppers, sautéed spinach.
We like bringing out of town guests here for a bite because of the atmosphere and the food. Some of the best burgers in the city.