I read Snape/Harry rather frequently, simply because there are many fics that are really excellently written, but this is not a pairing that appeals to me from the outset. While for Snape and Black I see the potential in the novels, as I do for Sirius and Remus, I have to be convinced about each individual Severus/Harry fic anew. An additional difficulty is that Severus/Harry usually has to be set in future to make Harry of age (unless it's an abuse fic), and I generally prefer stories that are set within the narrative presence or merely a little later. (Well, this will be no problem when the next two novels are out.) But I will always see Harry as Severus' (former) student and some 20 years younger, and this is something I do find slightly disturbing, on a very instinctive level.