This visual effects extravaganza failed to connect with me on an emotional level. I kept thinking that the storywriters missed huge opportunities; and hollow cliche-ridden characters and shallow performances couldn't get me to care about the plight of the Navi or the Jake Sully character. And the poorly executed deus ex machina ending had me leaving the theatre feeling very meh. If Cameron released this five years earlier with better actors and more compelling script I would've not been so nonplussed. But there is nothing here we haven't seen before.
And I'm a VFX fan. The 3D is good, but not Coraline good.