Just saw Inception yesterday; I also found it ultimately disappointing, though enjoyable as an experience. The way I felt was, a movie like Inception should leave you wondering whether you're awake or dreaming, is any of this real, etc. Inception totally failed to do that for me. It drew me in on a purely superficial level, which made me wonder how Robert Fischer was getting so completely taken in.

Did you see it in iMax or 3D or whatever? I got the impression that it might have improved the experience.

The punny names were also a little painful, especially once I understood that "Moll" is actually spelled "Mal"--how convenient that your crazy-ass wife's name is the Latinate root word for "evil"!