I'll admit that I hated it but am genuinely curious what you got from it.
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I just watched it as well, and I think it's a good movie. The basic storyline is a bit old hat, it's been done to death on the Earth, essentially big business coming in and and destroying some habitat whilst the noble savage fights against them. The bod being brought in to help the baddies, and then realising that he's on the wrong side (with the help of an attractive girl) has also been done multiple times. Having said that the storyline for that is about as good as you could hope for, although inevitably the "baddies" are a bit two dimensional, and don't really have an complex motivation.
The graphics and concepts were done very well however. It's very easy to become fully immersed in the imagery (even without the 3D), and forget that the vast majority of the filming was done on a computer, and even when people have been acting in person, that probably just made the cgi even harder (ie lots of motion control camera rigs etc). The animals and machinery are very well done, and look about as real as you would expect, although pretty alien.
It was a little disappointing that the intelligent aliens actually weren't very alien, essentially bipedal with mannerisms very similar to humans. Given that on this planet, the only species which shows it's teeth to indicate happiness or humour is humans, the likelihood of another alien species using exactly the same mannerisms is small. Of course all of this was done deliberately to make it easier for the audience to empathise with the Na'vi. Likewise giving the female Na'vi breasts was a deliberate move to make them more human like, since the Na'vi wouldn't have breasts given their physiology and genetic heritage! It would have been interesting to have given them six limbs, as some of the animals had, but even in movies like Bugs they didn't do that, since it made the "people" less anthropomorphic.
It was quite impressive that the language they speak is "real". They actually got a linguist to invent it, and if you look at the
Wikipedia entry it's actually pretty complex (far more so than I can understand!). The wanted something which was different from any existing language, but which both the Na'vi and the humans could speak. I guess it also has many anomalous irregularities, since some of the mistakes in speech that were made in the film have been brought into the language, so that they are no longer mistakes!
So overall I liked it, the story's a bit old, but done pretty well, and with exceptional "filming".