Definitely the Addamses. They were all so happy with what and who they are. It was the rest of the world that was nuts.
As opposed to the Munsters, which seemed to mostly consist of people running from Herman in sped-up film.
The Addams all looked human (save Thing and peripheral members like Cousin Itt) but acted bizarre and macabre, which is more interesting than the Munsters who acted normal but looked like monsters.