Something tells me that you came into the flick with expectations that weren't met and that weren't the fault of the movie.
I agree. It was YOUR fault! Because this very thread was the reason for my expectations
As for The Matrix comparison? They haven next to nothing in common except for both being in the fantasy/science fiction genre. Inception is a love story disguised a caper film and The Matrix was about one big twist coupled with lots of eye candy actions scenes that in the end meant nothing.
This almost sounds like you came into the flick (Matrix in your case) with expectations that weren't met and that weren't the fault of the (first) movie
You really don't see the common theme of Matrix, 13th Floor, and Inception?
Imho, all of them tackle the problem of telling reality from illusion. Neo finds out that what he thought was reality is just a simulation. 13th Floor expands on that, implying that reality is just a simulation running in a simulation, etc. In Inception you're left wondering what is real, what is dream, and what is just a dream within a dream (, etc.).
All of these movies have the potential to make the viewer think about the nature of reality. Is MY world actually real? How can I be sure? Can I really trust my senses or my feelings?
Matrix and 13th Floor had that effect on me and Inception, unfortunately, didn't. Of course it wasn't exactly advertised as having that effect, but hey, it's what I hoped for!
Edit: Actually, after checking the Wikipedia entry for the movie, apparently Christopher Nolan himself seems to think Inception shares a theme with Matrix and 13th Floor:
When he first started thinking about making the film, Nolan was influenced by "that era of movies where you had The Matrix, you had Dark City, you had The Thirteenth Floor and, to a certain extent, you had Memento, too. They were based in the principles that the world around you might not be real."[23]