DISCLAIMER: I am no literary expert; my opinions only cover as much as my reading experience.
It seems that the further I got with the Harry Potter series, the less and less I like it. By the time I got through Harry Potter and the Half-Blood Prince, I did not like it to the point that I didn’t care anymore about the big plot points in the end. Sad, really, because I started reading the books thinking that there was more to Harry Potter than what the movies had to offer – an opinioned formed, ironically, after seeing the Order of the Phoenix film.
And for a while it did hold. The Prisoner of Azkaban and The Goblet of Fire were very good, fun reads. (I read book one many years ago and skipped book two.) Then it started falling apart on Order of the Phoenix – ironic, again, as it was the movie among the franchise that I thought had the real grit and meat.
I wouldn’t blame the disappointment so much on the storyline, which has become clunky and had questionable character motivations, as the method of writing itself. What I liked at first about the series – that the books were so damn easy to read, taking no effort at all – has turned into a repetetive grind. J.K. Rowling has no flare for flowing and inspired prose, I think, and that shows especially at the critical, action-filled moments, when I could see that, if they were worded better, would probably leave my heart racing in excitement.
I would say my biggest complaint about the whole thing is that, as the author did not have the writing chops to begin with, 99% of the narrative revolves around Harry Potter’s perspective. This reduces the books – and this includes each book I’ve read so far – to boring conversation-fests among the characters toward every end (like every other Hardy Boys story), or James Bond villain-type confessions and revelations – in the Goblet of Fire climax, for instance, where Voldemort divulges everthing to Harry before trying to kill him, only to let him escape later on. Plus it gets tiring after a while always reading about what Harry feels and thinks. If only the story was flexible enough to narrate from different angles… (And we might even gleam insights from different key characters, and from different sides of the battle.)
Therein lies the curse: J.K. Rowling has a great imagination, definitely, as she has already gotten me invested in her world and her characters (less so the emo Harry and the first-zenlike-but-later-turned-patronizing Dumbledore) through the movies and the books, that I am now semi-obligated, semi-compelled to see the damn thing through to the end, if only for the characters I came to like (e.g. The Weasleys, Snape, Luna Lovegood, Sirius Black). I’m hoping the payoff would all be worth it, but I’m saving myself some reservations.