I originally saw this movie about 10 years ago right after I read the book, a book that had deeply moved me, brought me to tears a few times... And like the thread starter, I was at the time quite disastisfied with the movie. I didn't touch me the same way, the characters didn't resonate with me as much, especially Del and Percy. I was particularly sore about Percy, felt I didn't get to hate him as much in the film.
That being said, I was 16-17 then, and last night I rewatched it for the first time and was completely blown away. The movie captivated me and moved me and I suddenly had a deep wish that no one else would touch King properties save for Darabont.
Of all the King adaptations that DESPERATELY deserve remakes, this one should stand the test of time as the definitive Green Mile adaptation.