It’s easy to like green in this light-hearted tale
Brothers Walter and Gary (Jason Segel: Bad Teacher) are extremely different. Gary is tall, Walter is short. Gary has a girlfriend, Walter is single. Gary is human, Walter is a Muppet. Just typical family stuff.
In spite of these differences, the brothers are close and spend their nights watching reruns of their favorite show, The Muppets. Since Walter doesn’t have much of a life beyond hanging out with Gary, The Muppets become his obsession.