Author has written 7 stories for Harry Potter.
I'm a writer by profession, a teacher by passion, and a reader by compulsion. I've authored seven stories in the Harry Potter fandom, all Dramione, (literally) hundreds of thousands of pages of educational, technical and organizational documentation, and two forthcoming books on business topics. I serve as a Validator and sometime-editor/beta for a well-known Dramione-focused website.
I tend to give feedback only to authors who've done exceptionally good or incredibly awful work. If you can't properly punctuate dialogue, I won't read your story. It demonstrates either your lack of care or your lack of education, neither of which bodes well for quality material. If someone gets a thousand glowing reviews from equally ignorant people (of which there are, sadly, far too many), his or her writing is no better than the readers' level of ability to distinguish quality from crap.
Now and then, I mentor writers who have great story-telling talent but need help with grammar and punctuation and who are willing to accept brutally honest criticism in the pursuit of learning. For the vast majority of members here at Fanfiction dot net, I'm also old enough to be your mother, and I'm most definitely an unrepentant and unforgiving snob when it comes to what I'll bother reading, but that doesn't mean that I'm not amazingly young at heart.
I've recently started hosting a blog on Tumblr targeted at helping fanfiction writers improve their skills. It's called Fanficwritersworkshop. Follow me there!
I trust that my point has been made. Dramione dot org, Archive of Our Own, and Granger Enchanted are high-quality sites for your Dramione and HP fanfiction pleasure!