There is no doubt that the plot of both Avatar films is very simple, something Cameron himself has admitted. But at the same time, Cameron also mentioned that the simplicity of the surface narrative does not mean that there is no place to dig deeper. In my opinion, the hero is a very special individual, and what makes Avatar different from other similar movies is that humans can choose to become Na'vi, but only some of them have that choice. In other movies, humans don't have the choice to become nature or another race. I think Cameron is telling us not to jump to conclusions, but to try to step into a group and feel what they are about before making our own decisions. In terms of viewing, Cameron's greatness shines through, as he is able to make a simple plot very engaging. This is very rare, and in the first movie he has a good handle on the pacing without boring the audience, with good portrayals of key characters. But to the second part, more than three hours long, although the rhythm is also good but still can not resist the fatigue of a long time to watch the movie, coupled with the final duel of the degree of excitement is not even as good as the first act or not as good as the second act of some of the clips of novelty. The overall feeling of the movie is not strong enough. In contrast, the landscape of the second movie is actually shrinking, from the first movie's focus on the fate of races and planets, to the second movie's focus on family emotions. The benefit of this shift is that it makes the movie more fleshed out and more empathetic to the viewer. At the same time, it's also less epic and grandiose, and makes the simpler plot seem more "family-friendly". In addition, you may find that the two films share some common problems, such as the lack of reasonable character motivation. With all these problems, why is Avatar still a good movie? In addition to the director's mastery of narrative, there is also a very important factor - visual effects.