I love the Harry Potter books and started reading fanfiction after Book 7 because I was fascinated with Lily and James' relationship. I love Maurader-era stories just because there's so much room to play with.
Sometimes my criticism is a little too harsh. I apologize. It just makes me so angry to read about weak women or strange gender inequalities in relationships. I may sound harsh, but I hold my fanfiction to high standards. I think fanfiction has a lot of potential and because of that potential, it deserves to be criticized like a real work. I am more than willing to beta for anyone or give anyone my opinion if he or she would like it. I also won't be offended if you don't agree with me. My opinion by no means is the be-all, end-all.
Most importantly, I don't try and review to put people down. I review because something about what I read made me care about the writer and his/her story. If the review is critical, it's because I thought the writer or story has/had potential and can improve in the future. I always try and be specific about what I don't like so that the author can try and see my point of view. I think it's helpful to point out what you didn't like. As you can see, though, my strong reactions make me somewhat repetitive.
Finally, to go back to Lily/James stories, I love original, stories that don't rely on cliches. I like my characters three dimensional and complex. I also like canon, but I'm always up for a little exploring into AU.