Amazing, beautiful, breathtaking.
Saw it in 3d, and I wouldn't see it any other way. It wasn't 3d in the sense that things reached out to you and you were like WHOA Something's Coming At Me! It made you feel like you were actually present in the environment.
The visuals were unlike anything I had ever seen, I felt like my brain had trouble keeping up with what I was seeing.
The characters were great, the animals were amazing, and because they took the care to animate them so well and give them animal behavior, you almost believed they really existed. They did a great job making you feel like this was plausible, including the depth of the Navi people's culture, and their amazing facial expressions. It made me think of the study scientist's did about the continuity of human facial expressions worldwide.
And to those who complain that the plot has been done over and over... I would just like to offer this: many great stories have been told over and over since the beginning of time. Things that resonate with humans tend to show up in stories, similarly, across all cultures. It is part of the human condition to tell these tales of our species and its interaction with each other and the world. I feel like this story could be told by the early humans hunting in the wilderness, and also by the war-inundated technologically-advanced peoples of today. It is timeless.
Aaaand, finally. I really dislike when people begin inserting racism and sexism and all other -isms into areas where they don't exist. If you think those issues are in ANY movie, then they are there, because your brain is inserting them there. Everyone needs to stop imposing things that don't exist (See: Resident Evil 4, Disney's Pocahontas.)
(Manapa: I love Avatar: The Last Airbender too. I was a bit irritated about the name of this movie, but once you see it, the name makes a lot of sense. And the Airbender movie is coming out in July I think? Damn M Night Shyamalan is making it so I'm not particularly enthused because he irritates me. I will definitely see it though. I love Avatar:TLA.)
Anyway, great movie. Go see it.