I am a writer, though I don't write fanfiction. Obviously, I do love to read it! I love Rizzoli & Isles, X-Files, Battlestar Gallactica, and Star Trek: Voyager.
I make comments for various reasons, but mainly because I want to encourage the writer to continue to entertain me! In general, I refrain from negativity, and because my goal on this site is entertainment, I won't essentially waste my time to read a poorly written (lack of grammar, proper spelling, etc) story and then comment on how to improve.
If you PM me, I will read it, but I can't guarantee I'll respond. If you're specifically hoping for a response, let me know in the PM. :-)
Recently, I stopped reading non-completed stories except for one or two I couldn't let go. Why? I'm too confused! I can't keep things straight and I always have to go back and read too much just to be able to read a current chapter. Sorry!