I am that person.
Now, I will admit that I try to downplay it by saying, "I just couldn't get into it," but inevitably I reveal my true feelings. Moneyball is a great example as people really liked that movie, and at best, I thought it was okay. It doesn't help that I read non-fiction, so I feel offended that they are changing events that actually happened to make a more appealing movie. Case in point: Unless Billy Beane's daughter taught Barry Zito a curveball, I don't need to know about her.
What makes me bring this up is the movie, Unbroken. Basically anybody who reads non-fiction read Unbroken sometime over the last few years. It's an incredible story, and there is no excuse for it to not be a really good movie. Still, there is no chance that I will watch. There will be weird alterations, and I will get angry at the movie for it, so it is best that I just stay away. I loved The Blind Side as a book, but I refused to watch movie, and I feel like that is the best decision I can make.
I can't help but turn up my nose at movies where I have already read the book, but just don't be like that. If you enjoy those movies, enjoy the hell out of them. Movies are pretty great in that you get the basics of the story in two hours instead of six. And the people that brag about how the book is so much better are just annoying douches.
Okay, now I'm going to watch some original television that is not based off books like Game of Thrones...wait, what?