I've never really seen Harry and Hermione together, I think she and Ron are perfect and compliment each other. About him and Luna I'm not so sure either. I mean, Luna is my favorite character and I would have liked some sort of sub-plot where she finds a teenage romance but, the thing is, she doesn't need it. Luna only needs friends to be happy and she got that. But I do see why you ship them together, Luna is even said to be pretty in the Half-Blood Prince. I have nothing to say about Ginny/Harry, except that I've got no problem with them. Though I don't like how Harry named their children as his parents.character. " .