Do you have a favorite movie based on a book that was faithful and done well.
For me my faves are the Lord of the Rings, although there were things done in the Two Towers I wasn't happy with, and the Harry Potter series has been great.
Casino Royale stayed pretty faithful to the novel, ofcourse they had to modernize it a bit, and it is the only time I liked a movie better than the book it was based on, I can watch it over and over again and not get tired of it.
For me it is very important for a film to stay as close to the book as possible, I hate when liberties are taken that shouldn't be, there's a reason the book is loved by so many and part of the reason a movie would be made of it.
Just like with Comic Books, the most successful ones are the most faithful, I wanna' see my favorite characters come to life, not what some outsider thinks.