I didn't know much about WATCHMEN before watching it. I assumed that a 3-hour movie would be self-contained. I was wrong, the script is a mess. I had no idea what was going on the first two-thirds of the film. It started to come together in the final section, but by that point I had completely lost interest.
The cast was weird, there were not a lot of sympathetic characters, and the voice-over seemed to be deliberately designed to bore the shit out of the viewer.
The sound design was good, though.