I don't think I could ever rob myself of the superior format of a story just so I could enjoy the show.
I read a good comic/book and it lives on forever in my head, tapped at any time.
I watch a decent show and it sits for a bit, then is replaced by whatever the new thing is.
Well, I started watching the show only knowing faintly it was based on a graphic novel series. Reading it now might be cool, but that's a lot of books to get.
I read the first Harry Potter and then stopped reading because the movies started coming out and I lost interest.
Loved the original The Hobbit, but by the time I finished reading it, the LOTR movies were coming out about a month later (I was in sixth grade when the first one came out.) So, I saw little point in reading those books.
And I see very little point in reading the Game of Thrones books as I really don't want the plot of the show spoiled in any way.
But that's just how I do things.