Smashburger is way overpriced. $14.00 out the door for a burger, coke, and fries, and the patty that you get is pitiful.
Five Guys is decent, but I think Wendy's burger is as good, and cheaper.
Whataburger is my favorite fast food burger. Perfect drunk food.
McDonald's regular hamburger is a good cheap quick lunch. Tastes like moist cardboard, but you get two for less than $2.00, and the calorie count is not too bad.