I think the only movie that was accurate to the book was the first one, to be honest. I think the problem with each movie is that it can't balance between serious and fun and image and script. Each movie is either a total joke (lol Prisoner of Azkaban!), or up it's own butt in serious SUPER SAIYAN HAAAAh action. And it's either all QQing script, or just, as I said, SUPER SAIYAIN HAAAAAH! BEHOLD MY GIANT WATER BALL!