I can understand what you mean there though I do think SOTL made a great transition from novel to film. I also think Hannibal the book was just silly and poor through and through. Harris obviously let the money go to his head .
In my opinion signs was good but a bit silly and was let down by a poor ending
Red Dragon was very good, take what Woss says with a pinch of salt. Red Dragon is far better than Hannibal and Manhunter, excellent performances all round. It is obviously far more enjoyable if you haven't read the book or seen Manhunter.
One hour photo is a superb film, one of Robin Williams finest perfomances in a film. If you only see one of the three go for this one i doubt you will be disappointed.