I thought Inception was stupid too, but anything with Jake Gylenhall in it is worth a watch for lookng at pretty things.
I think you are talking about Avatar, which I confess I have never seen, I read a one line review “Dances With Smurfs” and decided not to bother.
I just pulled out my mental notebook of previous forum posts, and rustyspanner has terrible taste in films, so don’t take it to heart. Aliens is in fact one of the best films ever made in both the With Spaceships and Not With Spaceships categories.