Although I don't personally write fan fiction, I used to read a great deal of HP fan fiction. My "favorite stories" list is primarily of stories that are completed.

I mainly like Snape-centric stories, angst, hurt-comfort. My personal "take" on the character is more akin to that of Whitehound, duj, or possibly E.M.Snape.

More recently, I am reading in a few other fandoms but far less often. I simply don't have much time anymore!