Kelsey's post, while legitimate, made me think of all the books I WISH were movies. Primarily, George R. R. Martin's A Series of Fire and Ice. It IS in the works to becoming an HBO series. Here is the official blog following that: WINTER IS COMING
Pride and Prejudice and Zombies is being made into a movie starring Natalie Portman. Anything with Natalie Portman and Zombies has MY vote!
The Umbrella Academy may translate well.
But I do have to agree that most stories are better left on pages between two clever covers.
also, P.S. I would go to a movie about Marmaduke if it was 3-D.