Gallifrey – Doctor Who
Doctor Who is awesome. That is a fact. Gallifrey is the planet where the Doctor comes from, so it practically makes this list by default. The planet has had some issues with… well, exploding, lately, but there was a time when it was pretty epic. The society is very rigid and somewhat dogmatic, which is probably why the Doctor decided to escape, but still very interesting. Check out episodes like The Deadly Assassin and The War Games to get a good sense of Gallifrey and the Time Lords who live there.