Well, I guess I have a little more to say; allow me to elaborate.

Were there good moments in the movie? Good sequences? Sure. I can't really sit here and pretend like it was a wholly unenjoyable movie. There were times when Snyder's panel-to-shot adaptation of the source material worked really well and it was kind of cool to see it in live action; there were smallish details that I thought would be lost but weren't; there were movie-things that movie-goers probably enjoyed quite a lot, things that I certainly like to see when I go to the movies: sex, violence, cool effects, etc.
But there was just something off about it. Because I had read the book, I knew what to look for. I knew what the plot was, what the director was trying to do in his translation of various elements from the original piece, all that. I knew what I was supposed to get - what the big, complicated questions were and the social, cultural, and artistic commentaries. But I don't know how much of that stuff I would have gleaned from the movie as a Watchmen virgin. Rather than succeeding in a translation of the stuff that makes the comic so good, I think the movie succeeded in shouting out to people who already knew what to look for, if that makes any sense. If the talkative (and really annoying) people behind me are any indication, something as fundamental as Silk Spectre's/Nite Owl II's non-superhero status (that is, their lack of superhuman powers) was lost on those who had never thumbed through Alan Moore's comic.
This may be sacreligious, but I almost wish Zack Snyder had made the story his own rather than attempting to adapt as directly as he did. It is possible, after all, for a movie to be totally unfaithful to the book upon which it's based and still be a good movie (i.e. One Flew Over the Cuckoo's Nest). I know saying that 'there was just something off about it' is vague, but I really feel like Watchmen and Hollywood filmmaking have a square peg, round hole relationship. Just like I said they would in my pre-release entry. Everything is proceeding exactly as I have foreseen it.
The temptation here will be for readers to jump on my previous entry as evidence of my original interest in a faithful adaptation - wasn't that what you were ranting about, Mike, the impossibility of a faithful enough adaptation? Well, no. I wrote about how impossible it would be for Zack Snyder to adapt Watchmen at all satisfactorily, but I also argued from the very beginning that there should not be a film version of the comic. At all. And I still feel that way (hence my one-sentence review). Even a Zack Snyder reimagination, which I know I suggested earlier (and which I think could have been more successful than what was released), would not have been better than nothing at all. Alan Moore said Watchmen "works fine as a comic," and I couldn't have said it better myself.
Without further ado, a list of specific things I hated about the movie. Keep in mind that for this section I am assuming that the goal of the project was to create a very successful adaptation of the comic even though, as you know, I don't think it should have existed in the first place.

1. Apart from the opening credit sequence set to "Times They Are a-Changin'," I think the score was a failure. I got what they were trying to do. They chose iconic songs, songs that defined their time in history, songs that are quintessentially American. They wanted to amp-up what I'll call the 'now' factor in Watchmen: the idea that the story is as much a snapshot in time as it is a mystery-driven, pseudo-superhero piece. And, emanating from the historical 'snapshot,' it's a compromised and ugly big-picture of human existence. Even though the 'now' works with an alternate future, much of Watchmen's social, cultural, and political relevance comes from this 'historical sense.' So yeah, I definitely liked what they were trying to do, but I think they failed.
The music was extremely distracting. The double-edged sword of using iconic music is that while you're trying to show Blake's funeral - one of the most visually stunning sequences of the book in my opinion - viewers are busy thinking about the fact that "The Sounds of Silence" is playing. I'm definitely torn up about this, because like I said, I liked the idea they went for, but I definitely think it was over the top. Some of the songs only made it into the movie for about 15 seconds and seemed to serve no legitimate purpose. There was no need for "99 Luft Balloons," nor was there a need for the worst cover of "Hallelujah" ever (even though there are so many good ones) during that embarassingly long and...well, embarassing sex scene.
2. That sex scene was sooooo embarassing.
3. While it certainly stands alone as a blemish on the film, the Nite Owl II/Silk Spectre sextravaganza is an example of a more general trend: overdoing stuff. There was sex in the book, yes, but it was very brief and it wasn't graphic at all. They did this with the violence, too. Rorschach doesn't split the pedophile's head open with a cleaver again and again and again; he just douses him in kerosene and sets him on fire. 'Off-screen,' mind you, or out-of-panel since we're talking about a comic. There is no carnage in the scene at all, just smoke and fire. When his enemies are trying to get at Rorschach in his cell, they don't saw anybody's arms off; sure, they stab that fat guy in the neck, but there's a big difference between the two if you ask me. Nite Owl II doesn't snap a guy's arm inside out when he and Silk Spectre fight thugs in the alley. They just...beat them up.
The artificial elevation of these sensationalistic elements is exactly the kind of Hollywood bullshit I expected to see.
4. The fighting was too stylized. I don't care if crowds would rebel if the fighting looked 'lame.' Watchmen is not the screenplay to an action film. It is a comic book, a comic book in which real people who don't have superpowers put on costumes and go around fighting crime. They talk about struggling with equipment, costume malfunctions, and fighting techniques. They are out of shape (or they're supposed to be...another fault). They fight scrappy. I don't care if you think the slow motion was cool. I don't care if you think Nite Owl II and Silk Spectre 'kicked ass' - they weren't supposed to, or at least not as much as they did in the movie. Your action movie tropes are unwanted here. The people sitting behind me thought the masked vigilantes were superpowered superheroes. Failure.
5. They screwed up the ending. Not the whole framing Doc Manhattan thing in place of the monster - that was fine - but they messed with something sacred to me. Rorschach, at the end, is supposed to walk off into the snow alone and die. Nite Owl II doesn't see him get blown up (though of course Doc Manhattan is present) and the cliche "NOOOOOO!" is nonexistent. They also added lines for Rorschach, who is supposed to say, "Of course. Must protect Veidt's new utopia. One more body amongst foundations makes little difference. Well? What are you waiting for? Do it. DO IT!" He's not supposed to give a whiny speech about how Doc Manhattan should have cared more about humanity. No, no, no. You don't get away with that because of the non-monster ending; there was no need to add those lines and it totally sucked, Zack.

I'll end my review with a little in memorium section for all the little things I missed. I didn't expect Snyder to include everything, and I know there were sections that were utterly impossible to incorporate, but I missed them anyway. The Black Freighter. The kid reading The Black Freighter and the guy at the news stand. The lesbian couple near the news stand. More graffiti. Hollis Mason's memoirs. Rorschach's psychological report. Newspaper clippings. Letters. Apocalypse tentacle monster. Anti-colors.
I want to be clear that I am not upset at the idea of people enjoying this movie. If there is one positive thing that could come of this movie's creation, it's the spark of coolness that some will see in the story and characters. I love Watchmen and I want other people to love it too. If seeing the movie inspires people to read the book, then I am ecstatic that a movie exists, and that's that. Just as long as people read the damn book.