Avatar: The Last Airbender is by no means a new show. It has been around since 2005, but it is nonetheless amazing. The story begins with some exposition; there are four main clans, each controlling one of the four main elements. One person, known as the Avatar could control all four elements and kept peace. However, the Fire Nation started a war and killed the Avatar. The Airbenders were all wiped out, except for one; Aang. He has been trapped in an iceberg for 100 years, is the current Avatar, and is the last Airbender.
However, Aang is young, and only knows how to bend air. He travels with two members of the Water Tribe, Katara and Sokka to learn water, earth, and fire. A:tLA is long enough so that it doesn't end to soon, but is also short enough so that it doesn't drawl on to 700 episodes. This show has an amazing story, great character arcs, surprising humor, and an overall high quality. It is one of the greatest shows out there, and you should definitely watch it.