The Meaning and Secret of Inception

I know that the cool thing to do these days is to talk about how Inception is not that great, but I loved it, and this analysis of Inception explores  exactly why.
The film is a metaphor for the way that Nolan as a director works, and what he's ultimately saying is that the catharsis found in a dream is as real as the catharsis found in a movie is as real as the catharsis found in life. Inception is about making movies, and cinema is the shared dream that truly interests the director.