Sorry that it took me a while to reply. I am bad with comments. It is because I am secretly very flaky.

But, anyway, I agree with you. The characters' imperfections are what keep me reading the series, but the blatant favouritism of the author and the implied moral issues are (part of) what keep the series from being truly good. (I won't say "great." Nope. Nabakov, Eliot, yes, they're great, but JKR? Nope.)