This post contains Minor Spoilers. If you do not want to have your movie-watching experience spoiled, do not read this, and scroll further down.
(You have been warned)
As a whole, I found the Watchmen movie interesting, because it didn't soften anything. The scenes that dealt with violent and gorey things were... well, violent and gorey. It presented fights, injuries, murder, rape, dismemberment, etc. just as it would look in reality, with appropriate levels of violence, blood, jagged and protruding bones, etc. Sex scenes were shown as two people having sex, without relying on artfully filmed shadows, cut-aways, or shots of clothing strewn on the floor. Also, in a few scenes, Dr. Manhattan was shown fully nude. This was doubly cool because it flies in the face of the double-standard about nudity in the movie industry. It's apparently okay for a woman to be completely naked in American cinema, but men are hardly EVER shown in the nude.
I think my least favorite part about the movie was the soundtrack. I would have loved an original soundtrack, with music written in the style of the 1960's. I'd even have been happy with a classical soundtrack, but instead, I got my brother's iPod playlist. Aside from picking what were quite possibly the most cliche songs ever for every scene (Dr. Manhattan discombobulating Vietnamese soldiers to the tune of Flight of the Valkyrie, for instance), they had some really awful choices of music. For the sex scene set aboard Archie, they could have used any of the great covers of Hallelujah done by other artists, but they picked the original.... the most grating and convulsive and god awfully harsh version of Hallelujah ever. Don't get me wrong: it's a great set of lyrics, but other musicians have done it so much better.
My least favorite character was probably the Comedian. Ignoring the fact that he was an asshole in every conceivable way (since it was a part of his character), his acting seemed wooden and forced. I could see that he was
being an ass, but everything he did wasn't very believeable... in the flashback scene where he attempted to rape Silk Spector I., he went from conversational to OMG MUST COPULATE in a matter of seconds. He definitely acted like an asshole, but he didn't genuinely feel like one.
I think Dr. Manhattan was my favorite character of the movie. He was so kind and soft-spoken, and yet was undoubtedly the most powerful character. Also, there were points when you see that he has trouble understanding humans, being so far removed from the human experience, and yet then there are times when his emotions and humanity is obvious, in very poignant ways. He was a great character with great depth, and the actor gave an extremely solid performance on his part.