A kids' show that handled war, genocide, and redemption better than most prestige dramas manage.
Fun fact: Each bending style is modeled on a distinct real-world martial art, choreographed by a kung fu master.
Half the show is cutaway gags that have nothing to do with anything, and honestly that's the appeal.
Fun fact: Seth MacFarlane missed American Airlines Flight 11 on September 11, 2001, after oversleeping from a hangover.