Also, never quite got the appeal of Whattaburger. I love their breakfast options, but the burgers didn't seem like anything different? Maybe I'm ordering the wrong thing...
To me, it's just a hamburger done "right" as opposed to what you get at ~95% of the other places. In-n-Out to me is a better burger, I don't get Smashburger or Freddies, Culver is pretty good too in the Whataburger sense.
Fast-casual places like Five Guys is a different thing IMHO. Don't get me wrong, burgers with half the vegetable counter on them are good too but, aren't what I would call a traditional hamburger.