Once you've conceived a character as good as Katniss, you'd have to be really unlucky to mess the book up from that point. She's got everything - reader identification (who hasn't done it tough at some point, or felt oppressed), she can be as badass as hell, yet also so vulnerable you want to protect her, and most girls who read about her want to be her - and all the guys want to meet her! Me, I'd follow our mockingjay to the ends of the earth...
Oh, and she's got a sense of humor too!