I'm OK with In-N-Out, but I don't go out of my way for it. My wife likes it better than any other burger chain. I come from the perspective that my first experience with them was in the 90s when a cheeseburger was maybe $1.25. Then they were a remarkable bargain, although that was also about the time when one could buy a McDonald's basic cheeseburger for 75 cents.
Still - if I'm really hungry I prefer a Chili's Just Bacon Burger on their 3 for $10 menu. Of course that can be about as much food for three meals, but it's not fast food.