Those magical pony tails bugged the hell out of me. That, aside from the predictable and formulaic plot, was the most frustrating part of the film. I mean, we can't even get a universal cell phone charger but this world has managed to evolve this cross-species universal connector? I spent the first hour and a half of the movie just looking at all the things in the universe that didn't make sense evolutionary. Spinning, light up lizards? Easy prey. Light up plants? Waste of energy. Sentiment network of trees? Trees don't have the ability to move so increased intelligence doesn't do a whole lot for them. But those plugs were worst. It allowed the horses and dragons to be enslaved, pretty much. I mean, the dragon goes from hating Jake Sully to complete obedience once he plugged in to him. I'd have to think any dragon that doesn't have a built-in tool for domestication would have an advantage. Plus, how could so many species all evolve to the same form? It's too complex to be a leftover from before they diverged and it wasn't even shown being used with two members of the same species (except for sex, apparently. If that's the evolutionary function of these things, then the movie suddenly became infinitely creepier. And the loin clothes make no sense.)

Oh, and one other thing: The society of the Na'vi was ridiculously similar to human society. I mean, chimpanzees have 98% of our DNA, but when a chimp shows its teeth, it signals danger. So what are the odds an independent alien species has all of the exact same facial expressions as humans?

And yes, I realize this is a movie and artistic license is given. I know it wouldn't work if they had different methods of kissing or counting then humans. But I still feel like James Cameron wanted us to accept that this world could somewhere exist in the universe, and it really couldn't. The movie presents itself in the context of science fiction, but it is much closer to fantasy. I would have been much happier if they had arrived by wardrobe, not spaceship.