What does it mean to be a true fan?

[Gorwingel]

To be a true fan, you have to really like the books or movies.

What! Does this mean you can't like both?

(I get the quote, don't worry)

I personally believe that it is very hard to make any kind of "qualifications" for something like this. If this topic would have came up a couple months ago I would have gone straight into the "you must be into the books to be a true fan" kind of thing. But I guess (recently and surprisingly) I have grown up, and I am ready to accept fans of all types. I guess you just have to be in to it in a way, and exposed to it, and maybe it has to be part of your everyday life. But, yeah, this is hard