I'm an absolute Tolkien fiend, I've read the Silmarillion, Book of Lost Tales, etc, over and over, but the books just have a lot of problems that would really not work on the big screen. Same with Game of Thrones.
I tried reading the Silmarillion but gave up half way through....just didn't like it because it seemed far too over-complicated, chaotic and archaic for me ??? And yes, it would never work as a movie. I just hope they turn all the books in the Ice and Fire series into a tv series though. I now have episodes 1-7 to watch from series two. Looking forward to that :)