Eragon, The Lightning Thief, and The Last Airbender were all pisspoor excuses for adaptations. And on Paolini being on set for Eragon, he approved of ALL the changes and said the movie was great. Just to add to the insult, Shyamalan does intened to adapt the rest of the Avatar series, regardless of critical reception or commercial performance. But nothing is set stone. We'll find out at ComicCon in a few, what? Days? Weeks? And The Sea of Monsters film is already in the works, and guess what: Chris Columbus is working on it. My biggest complaint about Columbus is begins the first two Harry Potter films, he stayed perhaps too faithful to books and failed to realize the need for a dark-er atmosphere and A LOT CG effects for films like that (even Return of the Jedi had more CG work). And so he goes with the opposite for The Lightning Thief, that is he strayed too far from the plot, changed up EVERYTHING, used too much CG, and made it too dark atmosphere-wise. If only he can find a median, and make some more original films.
The rest of the Potter films I enjoyed because, even though there were some details (some minor, some major) missing/changed/added, they looked and felt just right. Because of how pathetic Eragon was, there is a petition to have it remade more accurate to the novel and with an entirely different cast and crew. But I can guarantee you, if Eldest is ever made (which I hope won't happen and doubt anyways), and when The Sea of Monster and The Last Airbender 2, I will refuse to see them.
Slightly off topic: Could someone tell me a but more about The Hunger Games? My brother practically worships the books and tries to force me to read them. His aggressiveness is what's making me not read them, plus he always goes into a rant on how "The Hunger Games movie better not be terrible." I usually don't read the book description on the back/inside the cover because they're too vague. Just a brief summary of backstory will do.