Honestly it was a fine movie. It's not the most original story ever, but it had everything in it. Pretty much the only movie that did 3D right, insane CGI and motion capture, a beautiful alien planet, fuckable cat-like aliens, an appeal to nature, great action, beautiful cinematography, fucking alien pterodactyls, etc. The beautiful floating mountains, sea-like flora, etc. It's a hell of a movie. It's not deep or meaningful, and as someone else pointed out here, for all the money it made, it didn't leave too much of an impact on society, but I enjoyed the hell out of it.
But like, there aren't Avatar toys at the toy store, people don't dress up as them for halloween really (maybe like first two years after it came out), etc. But shit like Frozen, I mean the toy store is still full of their crap, and every isle in the store otherwise has Elsa and Anna on every conceivable product. But none with Jakesully and Neytiri. (Toy store for my kid lol, not me)