Thank you, Clare! I'm with you on the addition of plot to a PWP. I find that I'm craving that aspect more and more -- I want something more substantial than sex, as enjoyable as that can be, because when you have a plot wrapped around it, then it makes the physical exploration of the characters that much more satisfying. So I totally agree. I'm glad you got that out of this story!
Regarding Harry's obsession with the HBP, that's an area that has a lot of potential for more delving, I think -- and what makes it good is that it can fit perfectly into canon events, but just be the story-behind-the-story; the thing Harry did not admit publicly to the canon readers. But, oh boy, was there more to that than it seemed. *grin* (At least that's how I like to think about it!)