For me, fandom is almost the whole point of a new series, and when an author denies me that I get extremely GRRRR!faced and lose respect for them. ESPECIALLY if they end wrongishly. There are very few fandoms that I am both A) content to not be fannish about and B) actually like enough to want to reread/rewatch.

It's a loop! The more I like something, the more I want to be fannish -> the more fannish I am, the more I like it and want to reread it.