A lot of people say that fanfiction is too easy makes me really confused. If it is too easy, then how come there are a lot of people who try to write fanfiction have no concept of characterization or plotting? It cannot be just because a lot of people never wrote before. It cannot be because there are hundreds of self-insertions that are pure crap. No, it is because fanfiction is hard to do. A good fanfiction writer knows their subject, the world, the backgrounds, the places. They have to research just as much if not more into places and people to get the same sort of feel or to expand better on something that was only briefly mentioned in the original work. Think of it as being an apprentice to some great businessman or craftsman. You have the basic blocks to write and you know the style of your master's works, but you must take the theme, the blueprints and expand on them. That is making a good fanfiction.
I prefer to read a lot more fanfiction than real fiction online because it is harder to find a good original work than it is to find a good fanfiction. There are authors out there who write beautifully, expanding on characters and places without losing the strengths of the original piece. Like myself included, they have lives and jobs outside of online works and have decided to write in the pure enjoyment of writing. It has nothing to do with originality or not of the characters, it has more to do with the originality of their viewpoints of the characters in the worlds that they love. And that is what it makes it good.