There are several fan fiction works that have really impressed me. A friend of mine wrote some FFX fic back in the day and I was really impressed by it from the position of "It\'s so believable." Another fan fiction work that I\'ve read was an AU Heero/Duo fic that completely turned me on every other chapter if not every chapter. It was very well written and the smut melted in your mouth. I don\'t recall the title, but it impressed me from the erotic side of the house. I\'ve also been impressed by my friend\'s SW fic for many of the same reasons I was initially impressed with her FFX fic.
There\'s other fiction that I\'ve read that I\'ve been impressed with, but overall, my friend\'s collection of FFX fic (including a work that\'s upwards of 75 chapters long) and that Heero/Duo fic are some of the most outstanding.
My two bytes.
STP