I'm sorry that I'm reiterating stuff that's already been said in this thread (which I have not read and do not have the time to), but I kinda gotta vent now:
I just saw this movie tonight with my friends. and I loved it. Do not get me wrong, I thoroughly enjoyed the story and most of the characters' development, and don't mind the rehashing of this plot from Dances with Wolves, Pocahontas, or Fern Gully. I would honestly give it 3.5 stars out of 4.
3 things pulled me out of the movie, however, the first being Sigourney Weaver's Avatar's super pointy nose. that made her look too human to me and pulled her into the uncanny valley. Every other Navi and Avatar looked realistic and unhuman enough to be fine in the threshold of awesomeness. This point isn't anything really important, I just want to say it.
The second was the fucking mech suits. They were the absolute worst designs and demonstrations of engineering ever. First off, if you're gonna go into a forest, you build a machine with treads and make it fucking powerful to plow through the trees, no fragile feet to mess shit up. Second, you do not have external add-ons like guns which you pick up and fire or knives which you draw and wield. Those weapons would 100% without a doubt be integrated into the suit, like in District 9. The whole hand/arm interface that the user had was ridiculous and a joystick would have been much more useful, less tiring, and more realistic/probable to be implemented.
The third thing was Parker (the head of the mining co, not the army dude)'s character and his bull headed stupidity (I'll accept the army dude's bull headed stupidity just because), which I felt was taken way too far to an extreme. No one who was able to get to his power and position in the company could be so extremely unwilling to make compromises or even see another point of view as at all plausible like he did. And, even tho he did show some remorse for the actions right after the first wave was executed, his final view was not sorrow or sadness for the Navi. This point could be explained away from me with enough work, but the other one (the second) stands strong (the first I don't care about, really).
Another small thing that irked me was the biology of Pandora (with me already accepting the fact that the creatures had uplinks grown into them and everything interacted with the deity) was that all the animals and creatures had 6 legs, except the Navi. Biologically, as evolution occurred on the planet either more creatures would have 4 limbs like the Navi, or the Navi should have 6 limbs or at least 2 vestigial parts of limbs.
Also, just something I wanted to point out b/c my friends didn't notice it from the movie, the Avatars all had 5 fingers, while the Navi had 4.
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For those who think this is too long to read, I loved it but there were things that bothered me.
And fuck mech suits and the mechanical/civil engineers who consulted on this project.