Grumpy Cat is one of the most famous cats on Instagram. His constant frown has made him an iconic character, and he's not the only cat who has parlayed a ridiculous expression into a career. Having said that, most successful Instagram cats have varied personalities. You'll see them playing, sleeping, cuddling, eating, strutting, and more. Unfortunately for Rigby, all he does is sleep. When he's awake, he has what we've dubbed "The Rigs Face," which consists of an indifferent stare into your soul. It doesn't translate well on Instagram.
