I saw the movie without reading the books. I liked what I saw, about the story, and my wife absolutely loved it, so I bought her the books and plan on read it once I either finish the current books available from A Song of Ice and Fire, or they are all out and I read them all, whatever happens first.
I might be very wrong, and it might not even be in the books, but I didn't like some of the options the Direction made, from what I've gathered about the story.
First of all, their entrance in the parade was just... lame. I expected more. Then, from what I understand, every district has lost the war, and thus lives in misery (or close to it), so even though the people on Districts 1 and 2 actually train for that and volunteer, I don't know, I thought it was kinda harsh to them as well, I mean, you train your whole childhood for a 0.5/24 chance of making it to adulthood (since you have a "friend" with you training the same way and going to the Games as well), I thought the movie was supposed to make you feel sorry for all of them, even though you clearly knew who to root for, and what I saw is that the majority of the guys left after the first wave are just a bunch of #$&*@!. And how DID that alliance work anyway? Sure they all knew they'd have to kill each other, but why did they come together in the first place? What was their agreement about it? Who was the smartest one that had the best plan to waste the others?
Also, Rue. The way the movie showed her, "spying" on Katniss early on, then following her through the woods and all, I fully and completely expected her to plunge a knife on Katniss' back up to the very last moment (yes, I know, she heald her, etc., but it could work the smae way the "alliance" of the other guys did, she simply needed some help, and Katniss was an 11 after all...), instead of understanding (which sunk in at that particular scene) that she admired her for... whatever reason. Not explained. I couldn't really expect anyone to shed a tear for Rue, even though, from what I've understood then, they're supposed to.
Then... the three-fingers gesture. I'm pretty sure that's really important, and it just lingers there. The scenes it is showed are all awesome, and still, I have no freaking idea what it means. My wife read it yesterday and told me, and c'mon, it's a pretty big deal!
Also... sponsors. How the #$&*@! does that work? Why is she the only sponsored one? What can sponsors do? How come the organization can simply blow half the scenery up just to get a single competitor and no one cares, if it's supposed to be a "reality show"? What is that stuff that insta-heals them? How come they have that grade of technology and not a single gun?
Overall, I just thought they were amazingly loose on details for a 2:30 hour movie.
Still liked it, do not get me wrong, but... I expect to be thoroughly dissappointed by it once I read the book, or I know I'll be disappointed at the book, if it's not the case.