I very, very rarely ever give anything 10 out of 10, because I firmly believe that nothing's perfect. However, you can't put 9.6 on your IMDb review, so I guess I'll just round up.

Avatar: the Last Airbender stands head and shoulders above any other children's programming, and mostly only contends against Batman: the Animated Series for top seat. Avatar has one huge advantage on Batman - Avatar has a running plot where the characters evolve, change, and learn new things. For me, that's what puts it just a nudge ahead to claim the top spot.

Avatar created a vibrant, original world with deep philosophies, colorful characters, epic confrontations, and real emotional stakes. The Four Nations may very well be a modern Middle-Earth. The show combined top-tier animation with linear, profound storytelling, and excellent voice acting. The show had great drama, comedy, and action, and switched naturally between them.

What can I even complain about? Well, it sure was disappointing that Mako passed away while recording season 2, so they had to re-cast him. Frankly, you can't compete with the master. Also, in season 1, there are a few episodes that could be considered filler, and don't advance the story or characters that much. Remember, though, that this was done at a time when the fanbase was still growing, so they couldn't just dive into the story.

Aside from these few nitpicks, this show is superior in every way. It's definitely a modern classic, and I would recommend the show to anyone and everyone.