good back-story, and good acting

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.

The movie's neither hopeful in contrived ways, nor hopeless in different contrived ways. Somehow it manages to be wonderful

All of these films share one commonality, that being a kind of emotional center that humanizes a cast of monsters.