I'm going to skip the special effects and skip to the plot. Avatar's plot was fairly unoriginal, although it had some interesting twists. My mind and emotions felt torn as they struggled to understand the genre. Was I watching a video game? A Disney film? A drama?
I have trouble becoming emotionally invested in a film unless I can identify with the main characters. Here, it is possible to sympathize with the protagonist, yet he does a lot of stupid things. Who cares if he gets eaten by a wild beast or not, while exploring a mystical jungle?
And then the romantic sub-plot begins to develop. Sure, "sex sells," but is it really necessary in this film? It seems like his decision to help the Na'vi arises solely out of his love affair with one woman. If it weren't for romance, where would he be? Still wandering in "Pandora"? +/-