Audiences experience 'Avatar' blues - CNN.com
Of all the false problems that people could whine about: Folks suffer post-"Avatar" depression.
Maybe I'm cynical, but I suspect this is more of a bid for attention than an actual DMS-III affliction.
My advice for people who yearn for the beauty of the images in "Avatar": Visit (or see footage of) a real rain forest. Travel to Washington State, or (if you can) Hawaii or another tropical place. Read some science fiction or comic books, and use your imagination. Just don't whine that reality wasn't created by James Cameron.