If I could ask J.K. Rowling anything...
Well for starters I always thought Harry and Hermione would end up together because from books 1 - 5 it certainly seems like it and then book 6 came out and all it was was Harry's internal dialogue about a monster in his stomach every time Ginny was around! I was like 'What!? Since when has Ginny interested him in that way!?' I mean it was obvious that she went for the whole James and Lily concept again, but seriously! Why write 5 books that look to be going one way and then write the last two which don't make sense when it comes to the pairings? I mean, it seems more like Ron and Hermione hated each other the whole way through and then they suddenly love each other? I mean come on! Plus, Ginny had some weird obsession with Harry, I mean that would scare guys off, not have a random monster appear that needs its appetite satiated!
Okay...rant over. I would ask her these things...