Yikes everyone is still arguing.
Avatar was an excellent movie in my opinion.
Avatar had a fairly original plot in my opinion. (I don't recall people growing genetic representations of alien life and linking in to them so they can walk around as them in any other movie.)
Sure it has a similar overall plot to Ferngully, Pocahontas, Dances with Wolves, and many other stories before it but seriously pretty much ANY movie has similarities to other movies which have similarities to stories written long ago. Ever hear of "Hero's Journey"? That phrase right there encompasses many movies and almost all games out there. They all follow a similar plot but are made unique through character interactions and story twists.
Avatar was a major technical achievement for film. (Not an opinion).
Avatar was nominated for best picture (not an opinion, and also shows many others liked the movie).
Avatar was created to entertain, and did entertain many people (again, not an opinion, I don't know a single person in real life who didn't like that movie).
I'm not sure why people are on here acting like its the worst movie they've ever seen. If its so bad why click a link on Macrumors that says "Avatar" in the title?