I think it's due to the richness of each character's distinctive POV combined with an omniscient narrative presence--kind of a unique way to tell a story. Sort of character-specific but not to the point where it's hard to balance voices.
The description is also rich enough while still very direct, which lends itself to a nice amount of individual interpretation, for me!
Completely agree with this. Although I enjoy the show for it's own merit, the books are much more engaging for me. But, in general, from books you always get things that simply cannot translate on-screen. With ASOIAF, I love looking into the inner thoughts and motivations of characters. I also enjoy the mysterious and eerie elements that GRRM incorporates in the books that I personally feel is missing in the show.
Edited by RedChick, 13 May 2013 - 12:56 AM.