As soon as movies like Dredd or Hellboy are mentioned (in the OP), I have to assume he really should have named the thread "Underrated Comic Book Movies." Because those certainly aren't superheroes in the traditional sense that I think of them at least. Losers, Constantine, hell half of the movies mentioned here aren't really superhero movies, they just happen to have come from a comic book. So I have to assume that's what Astro really meant.
Another vote for Unbreakable here. I remember taking a bunch of friends to see that, and everyone (including myself) feeling let down when the lights came up at the end. Upon further viewing though, I love the movie. My favorite scene is the one where he stands in the subway with the Enigma-like music playing and touches all the people, seeing the horrible things they've done and deciding who he is going to stop. That scene still gives me the chills every time I watch it (partly because the music fits it perfectly).
Another vote for Unbreakable here. I remember taking a bunch of friends to see that, and everyone (including myself) feeling let down when the lights came up at the end. Upon further viewing though, I love the movie. My favorite scene is the one where he stands in the subway with the Enigma-like music playing and touches all the people, seeing the horrible things they've done and deciding who he is going to stop. That scene still gives me the chills every time I watch it (partly because the music fits it perfectly).