It's hard to believe that Avatar: The Last Airbender wrapped up over a decade ago. (Feel old, yet?) The Nickelodeon animated series grew a huge baseman of both young and older viewers during its three-year run and this popularity hasn't waned one bit since it went off the air. In fact, as more time goes by, the more highly-regarded its legacy becomes, propelling it to the hallowed "modern classic" status few cartoons of its era have been able to achieve. Of course, we haven't exactly been starved for new Avatar content since The Last Airbender saga concluded. Aang, Zuko, Katara, Sokka, and Toph's adventures have continued in comic book form, as well as — with the exception of Sokka — their older, future selves in the sequel series that followed Aang's Avatar successor: The Legend of Korra.