It seems like nobody who comments on this show is willing to give credit where credit is due. Michael Dante DiMartino and Bryan Konietzko are the creators and executive producers of the series. Nickelodeon has nothing to do with the creative process or anything of the sort. All Nick does is air the show on their awful network and slap their annoying watermark in the bottom right corner.

That being said, the show is truly amazing. The characterization is great and the voice actors fit the characters well. The animation is of a fairly good quality, although it's clear that some corners are cut with the animation at times.

The reason I say the show is amazing is because of the concepts. The martial arts and bending of the elements are a real joy to watch, and you can tell that a lot of thought was put into it. I would recommend this to anyone who still has enough imagination to fully appreciate it, (a rarity in recent times), and to anyone mature enough to be able to enjoy something that a kid could enjoy as well, (sadly enough it seems these days people think something has to be full of torture and death to be entertaining.)