As stated before, the compelling story, twist on the future, and the "what would you do?" aspects of the story make this thing stick in your hands like crazy glue and really learn to care for the characters and their plights. On the other hand, some people may not agree with some of the choices our protagonists make. While it's clear in the arena who's more adverse to killing and who's not, other moral lines get blurred a little bit. (Spoiler Warning!) While it is noble that Katniss pretends to be in love with Peeta to keep them both alive (and is, in truth unsure how much she's just acting), she only reveals to him much later that she does not return Peeta's feelings towards her. While it is meant to be for survival purposes, the two do share a sleeping bag to combine body warmth on a couple occasions when it gets cold. So while it may be for survival, in an age where so many moral lines are blurred about such topics, I'm not sure I'd be comfortable putting that in my book.
In the end, I very much enjoyed the Hunger Games. Being set in such a unique storyline as well as reading this girl's every thought as she experiences hunger, pain, love, and loss makes it all the more compelling. But I can only hope that by then end of Cathching Fire, and certainly by the end of Mockingjay, Katniss has a better idea of the difference between survival and morals.