“Book One: Water was a good start. Sure, the first few episodes were a bit silly at times, but always keep in mind that it is a Nickelodeon show. And it has the most filler episodes that are obviously filler and nothing else. It only gets better from here.
Book Two: Earth took everything good about Book One and injected it with cactus juice. It had more episodes that focused on the characters, their relationships, personalities, strengths, weaknesses, etc. It always felt like a more personal season to me. Very few shows end a season on such a depressing note; I love it.
Book Three: Fire was definitely the best season. I liked that it had more one-off, filler episodes that focused on the characters rather than big arcs before the mid-season special. But my god, the mid-season special was amazing, especially at the end when it was all a trap, and Zuko betrayed his father to join Team Avatar. Then, the finale. No words to describe how incredible the finale was.”
–u/SorcererSupreme21
Source: https://www.buzzfeed.com/morgansloss1/tv-shows-better-and-worse-over-time-reddit
