I think that Chick-fil-A's slogan "Eat more chikin" is a very interesting, original slogan that separates their brand from other fast food companies. What is one thing that almost all fast food places have in common on their menu? The burger. Chick-fil-A is one of the few places where you can not find this popular item, and their slogan helps you realize that. Instead of taking that as a negative, you embrace it because it is a part of the brand itself.