First off, i wanted to reply to another person's comments, the person that really went deep in their soul to hate this beloved series. First off, this show was all about growth and maturity. Avatar Korra, the next Avatar after Aang, was on a learning curve, practicing and learning the how-to bend each of the 4 elements. Throughout the series, we are confronted with tons of spiritual, emotional and mental issues. Each one, was a learning experience, and it advanced the series. Korra, learning to be patient and knowing that she can accomplish anything that she puts her mind to. Tenzin, learning to grow as a spiritual leader, and learning to be his own person rather than following his father's footstep, and finding his own path. Thats what this whole series about, learning to find your path, and who YOU are.
Now, as for a review, its a wonderful series, challenge social aspects and teaching us how to grow from mental and spiritual and emotional issues. Not only to grow as a society, but to grow as individuals.