You know what, I feel like giving my honest opinion on this one dammit. You don't have to read this, but I'm putting it up here anyway. Why? Because I feel it is important for this movie to be successful. Not only because of my enjoyment for it, but because it was a significant investment, and chances are if this fails, it'll be a long time before we get any studios taking a chance on something that was this costly again.
Ok, so I told you I'd give you my honest opinion, and here it is. The story is mind-bogglingly generic. The characters are not very developed past their templates, so there's not a lot to grab on to emotionally with them. There is some, but not a lot. It's never bad, but it does fail to reach something good at the same time. It just feels like Cameron was playing it VERY safe with the story on this one, which doesn't make a lot of sense, given how much risk he took, and how much of himself he injected into everything else. I'd be lying if I said I didn't want more, because honestly, I expected a little more from him. He's never been a brilliant storyteller, but he's also never been this lazy with it.
That being said, I LOVED IT. The world he has created here is absolutely incredible. You have never in your life seen a movie like this, and probably will never again. The effects are FLAWLESSLY integrated with the live action stuff, and everything looks real. He actually delivered on his promise with that regard. While the characters are bland, ALL of the actors have brought their A-game, so the performances are top notch, and they do inject emotion into the story and characters. There is SO MUCH detail put into EVERYTHING on screen, it sucks you in.........HARD. The most impressive thing to me was that they nailed ALL the facial animation and they eyes have life in them. They're not the dead children of the corn eyes you see in stuff like The Polar Express. For all intents and purposes though, the moon, Pandora, is a completely realized world, full of life and rich with history. It's a 2 hour, 40 minute movie that feels like a solid 2 hours. There are several scenes that made my jaw drop, and a few that I actually said "WOW" out loud to. The 3D is not gimmicky in the least. There is never a single "jump out at you from the screen" effect, it's all used to immerse you and give depth of field. It didn't hurt my eyes at all, and if this is how 3D is used in the future, it should be used for EVERY movie. Yeah.
So, the big question, should YOU go see it? Honestly, I think you'd be cheating yourself if you didn't. It's a real treat. If you can get past the simple story on GI Joe (like I did), you can probably get past this one. If you have an IMAX theatre playing it in 3D near you, it's absolutely mandatory that you go see it there. No questions about it. 3D viewing is a MUST if you don't have IMAX near you, as most larger theatres have that Real-D technology now. It is THE most visually stunning movie I have ever seen in my entire life. I will be going to see it again, and I will be taking another trip into the city to see it in IMAX 3D. If I rated this movie on visuals alone, it'd get a perfect on any scoring system you'd like me to use. Because of the story, I felt he need to deduct two points though, so I'll give it an 8/10.