I don't understand, why it's necessery to specify the peiring(?) of the fanfic. As for me I think it's doesn't matter, because the only thing that is really important in your made-up story is the plot! It changes everything.
The fanfics that are really sucks, in my opinion, are always beginning with the phrase like:"Oh, I'll tell you the story of my live that will touch you upon" or "My life was difficult and interesting. If you want I can tell you about it and you'll shed a tear" and so on in that way. I just hate these few words, because the following story isn't as much interesting as them. So you get bored, can't concentrate and as a result you have a disgusting feeling after the reading.
I assume that writing is a difficult thing, but people should think about the contenst of the chapter! Can't stand when peole don't think about what they write. For example, "Рон изливался кровью, хрипел на полу, притворяясь, что ему плохо." Or "Дамблдор достал из клетки феникса яйцо Гарри." Or "Драко намазал волосы специальным геем." It's of course ridiculous, but sometimes it's irritates a lot especially when you want to find smth worthful!
It happens when I don't quite understand why do we need to read or write smth, because sometimes I just can't find the main idea of the creativity. Is it necessery to express ourselves? Or do we need to show smth to our readers? That's why I often think about life's sense. I just can't get it. What do we need to do? Why are we life? Whas it the divine craft? What is our destiny? And eventually who are we? Are we just ants or are we the creators of this world???