I think it's that it's rather realistic, as well as fitting in with "canon" for lack of a better yet equally brief term, what with everyone fighting and edgy and generally not happy happy happy! Or at least all their emotions and tensions stem from something much bigger than the somewhat petty little things of AMC.

Though I have to rescind my comment...now that I've read the end, this one is no longer my favorite. ;) *And* Nandolin has become one of my favorites for this story, up with Terentaule (did I spell that correctly? Probably not).