So J. K. Rowlings just had to tell everyone that Dumbledore was gay. Why did it really matter in the larger scheme of things? I had always viewed Dumbledore as asexual. And why not? Some people just don't have much if any sex drive. Seems to me she was just proving just how tolerant she is. It doesn't really add anything to the series of Harry Potter books. It may explain Dumbledore's heart-break---though you don't have to be sexually attracted to a friend for them to break your heart if he disappoints you badly enough as Grindelwald did to Dumbledore. Somethings are better left to the imagination.
Frankly, the last book was good but I was disappointed with the neat and tidy way she tied up loose ends. Rowlings' other revelations: Hagrid never finds love makes me sad and why Neville and the woman from the Leaky Cauldron. I thought Neville and that girl Luna Lovegood had a chemistry or does she die in The Deathly Hallows? And what happened to the Dursleys? I just don't know--the first 3 books were just perfect(okay there were no pookas and people were certainly prejudice toward werewolves) then Rowlings' own agenda started to subsume the story line or maybe not.