You're definitely not weird. I also tend to read them, for, what I find to be, better endings to a lot of the animes/mangas that I deal with. They are usually quite creative, but they don't usually have the best story line, because they aren't usually planned out fully, or mostly ahead of time.
So you are definitely not weird, but I'd more so consider you to be smart for reading fan fictions, that can sometimes be better than mangas, as they are not affected by any censoring.