There's some bad ones, there's some good ones, there's some disturbing ones, there's some that stays close to the fandom. Its a mix bag. I read a few Fan fiction and I written a few (bad ones though xD).
Depends on the Schreiben style, point of view, and what it is about. For me i like crack ship fanfics oder fanfics of my otp's. I lean Mehr towards the mature fanfictions as well.
I Liebe to write them and Liebe to read them as long as they aren't graphic, disturbing oder go into too much detail on some topics. On a whole I don't mind them
The same as any type of writing, for the most part. There is high quality work and low quality work. Some people do it for fun, while others take it very seriously. Fanfiction has been happening for decades--centuries, really, depending on how Du define it.
I Liebe Fan fiction especially when it makes Du feel the emotions the characters are feeling oder if it is just super good. In fact, I'm Lesen a Fan fic right now. GAILEE FOR EVER!