This movie is Cameron's attempt to challenge Hollywood. It almost feels like a double-dog-dareya.
There are three things in Avatar that stand out: the visual, the acting and the story. The visual is obvious. The visual, although sometimes horrible or terrifying were at the same time quite beautiful. The acting had moments. Sam Worthington did a subtle but solid job. This story, although not the most elegant, is a realistic story. Part of the brilliance is in the things Cameron did *not* directly point out in his story. He crafted an entire world and history as real as any other movie in recent history. Not sure who, but someone has a hand-sized shape on their cheek.
This is a movie that seemed to be built around the chaotic antics of an alcoholic superhero. The old watercooler joke, what if Superman do if he got plastered out of his mind?
This takes it along those lines until it introduces some odd elements in. Then the remarkable becomes a story of mythical love. The only strange part is how normal the world is comparable to the existence of these superbeings.
Enough mental exercise has been created to assume that mankind, living along side these beings, even hidden, would have mechanisms (social, legal and physical) to withstand and even more so, focus on or study their existence.
Either way, not a great thinker movie, but a decent popcorn movie.