To me the idea of dictating the way a game or film should play out seems knid of odd. I want to see what the artist's vision is - whether I like it or not. I know that people develop an emotional investment in their fantasies but insisting that that the story always play out the way they want kind of defeats the purpose of fiction IMO. 

I'm more sympathetic to the idea of not tampering with long established stories. I disliked some of the things done to the characters in the last Star Trek and Sherlock Holmes films, but I still enjoyed both of them. In any case, I don't feel that it's my place to demand that the creators compromise their vision to please me. If individual artists want to come up with creative forms of collaboration with fans, that's fine but I hope that downbeat endings, quirky character shifts etc. don't fall victim to some kind of art by consensus mentality.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken