Personal Grievance - A.D.D. from books made into movies

Why is it that I can never get motivated to read the book after seeing the movie based on the book? I mean I know the books are supposed to be way better than the movie, yet every time I go to sit down and read the freaking book I just get so bored and anxious. I wonder if other people get this way too?

My latest encounter with this is the book The Haunting of Hill House by Shirley Jackson. This has been adapted into two movies both with the title The Haunting. The later of which I have seen and rather enjoyed. I finally got my hands on a copy of the book knowing it is much different than the version I have seen, yet I just can't seem to settle down and read it. Every time I have attempted to the movie flashes in my mind, and I just get antsy and put the book down.

Now I have read other books turned to movies. The Lost World for example is a book I read intentionally to experience the book to movie conversion. I know the book is way better than the movie yet I can watch the movie but can't read the book anymore.

Hell I love Shirley Jackson. I mean this woman can do no wrong. Well ever since I read We Have Always Lived in the Castle she could do no wrong. So why can't I read one of the greatest haunted house stories every written?