Porno for the imagination
This delightfully-profane video introduces the phrase in the subject line of this post. It’s exactly right. Avatar is porno for the imagination. There are all of these wonderful details scattered around like confetti, and if the plot is a bit rudimentary, that’s okay: there’s lots of food for the imagination just in the setting.
A good rough guide to how strong something is at inspiring people is fanfiction.net. If people are inspired by a story, lots of stories will spring up there. Right now, there are 187 Avatar-inspired stories posted there. I like how things are going.
I dunno, fanfic is really not a stick i want to use to measure the awesomeness of any particular story.