I love watching Supernatural and reading good Supernatural fanfic is the next best thing. I prefer stories that are true to the show.
Great writing skills, grammar, vocabulary and spelling are very important to me. I also believe in reviews. When an author takes the time and effort to work on, and submit a story, they deserve the time it takes for the reader to submit a review.
My current favorites on this site are Empath by ciel4 and everything by Merisha. Keep up the great work!