This show is fantastic, and I'm sure there isn't much I can say that hasn't already been said already. From a literary standpoint, I would like to note that the world-building in this show is so great. Not to mention, the metaphoric and artistic usage of the 4 elements was so beautiful. The physical characteristics or "words" that describe these elements are perfectly performed in a culture or a character. For example, rocks are "stubborn" or "hard". This usage is further expanded on as you continue on with the series, particularly for the next series, Avatar: The Legend of Korra.