I don't think the Whataburger would dunk on the In-N-Out Burger, but I never really liked Whataburger or all the other burgers. McDonald's is decent, I guess, but no, the In-N-Out Burger kills them all.
I'm always down to try a new burger, but Shake Shack is still my top. What makes them so special is for the bread they use Martin's potato rolls which is just the best hamburger buns ever.
I'm an absolute connoisseur of cheeseburgers and like to think that I can detect even mere percentages of shift in fat content in ground meat in a burger and can actually name the temperature to which it was actually cooked to the degree if I'm, you know, really on my game.