Big thanks to Josh Tyler at CinemaBlend for writing this article. The use of 3D in The Last Airbender was everything that 3D should not be. It was used only for depth and added nothing to the overall experience. I would have rather seen it in 2D, and for my next screening I am going to.
Anyway, Josh Tyler wrote an article about the 3D in Airbender, and in the end, 2D is the way to go.