Sure it had flaws, but it was fun.
Ok, I keep seeing post after post complaining about several things that simply have no basis in reality.
It's not an intentional comedy. It's a pastiche. Deal with it.
Yes, there were lots of inside jokes and "homages" that you might not understand if you aren't a fan of the original comic and/or a classic (relative term, there) movie buff. Still, those [mostly] subtle moments don't detract from one's enjoyment if you don't happen to get them all. It's ok, have some pie. All's well.
There's nothing intentionally racist. Anywhere. If you think so, just think back to when a basketball-player-sized white guy dressed-up all in black to play the villain in Star Wars, and got dubbed over by a black man. Nobody freaked out then, because it didn't mean a thing other than James Earl Jones had an awesome voice more fitting to the role. You couldn't get away with doing that now, because the cultural mindset has changed and way too many people these days want to find something to call racist. Sucks, but it's true. Tolerate it for now, I'm sure we'll grow out of it eventually.
Miller only made one huge mistake: He directed the movie himself after having only done it once before, and he copied everything he learned on Sin City, which wasn't entirely appropriate for this flick. He should have gotten someone else do direct. However, in my opinion, there is a way to save this film: Do a 4-color colorization to it and make it look like the color version of the comic (the blue suit was most definitely lacking and sadly missed). Doing so would effectively justify the initial black-and-white treatment, which is actually the better way to do it if you intend to add color and make it look more like a comic. (I'd pay extra to see a new, 4-color-style colorized edition come out on DVD.)
And there ya go. :)