Well, I've never read the Watchmen comics. I first became interested in the movie after I saw the trailer with the Smashing Pumpkins song. I saw the movie Saturday night. So here's my "virgin" review:
I'd give it a 9 out of 10. This was a very engrossing, emotional, and overpowering film. When the movie was over, I realized my shirt was damp - I'd been sweating. It's one of those rare movies that, once it's over, I want to walk right back into the theater and see it again.
Rorschach was my favorite character. He had some great lines. Some of the gore we see in his scenes was a bit over the top, but the movie was just too good for that to make any difference for me. I was upset when he died in the end.
And the preponderence of blue dong was a bit too much, but I got over it.
I'd heard the end was different from the comic, and I expected the movie to take some really lame cop out, like Dr. Manhattan goes back in time and stops the bombs. But now that I've seen the movie and read up on the differences, I think the film ending was just as good as the comic ending.
I'll be recommending this movie to everyone I know.