I have developed a great deal of my english skills through fanfiction writing, actually. (Not on this site and not fetish - even though it did grow more and more sexy...)
Many think it's pathetic, and I admit reading about a celeb/story you don't like is a turn off - but I have always had sexual fantasies about celebrities and I think there's nothing wrong with it.

In fact most male lead characters in my stories are a celebrity I am thinking off (Often Viggo Morensen or Jonny Depp, or the like...) - but I don't make it obvious anymore since a fanfiction kind of limits the amount of possible readers, and is kinda something I tell myself I shouldn't do at the age of 20 anymore :-P