Both of them were great shows, but I'm going to have to choose The Legend of Korra. While the Last Airbender was this epic adventure, I like that the Legend of Korra had a different story to tell each season. It was also nice to have a different villain for each Book. Each of those villains also seemingly representing ideologies was kind of cool as well. (Ideologies such as Communism, Theocracy, Anarchy, and Fascism.) The whole "Ancient" vibe of the Last Airbender was neat, but I prefer the more modernized world of The Legend of Korra. Korra's growth as an avatar was well done as well. Especially her getting over her PSTD. Another cool thing about Korra was the lore, such as the story of Avatar Wan. Anyways, I'm sad to see the Avatar world come to an end for now. I hope they make Korra comics in the future.