All the people in this post are mentioning what they think are bad movies, but AVATAR is the ultimate example of a movie that completely insults the intelligence of the audience and yet get's praised as "deep" and "meaningful".
No. It's a stupid green aesop for 9 year olds. The characters are cartoonishly black and white good vs. evil. And the message of "evil westerners with their superior technology are bad guys and tribal peoples in touch with nature are noble" has been done to death in better films. Avatar is just visual SFX porn.