Oh man here we go. I'll do my best from memory since I read them all awhile ago.
Seemed like a pretty solid book at the time. The language and story were simple but were carried out in a proper, clean, child detective fashion. The whole eleven year olds fighting the most powerful evil in the world did not strike me as odd until the movies came out. The first book of a series always seems innovative, but I think I would have given this one 8/10.
Chamber of Secrets
Really just a simple extension of the first book. 8/10
Prison of Azkaban
Goblet of Fire
I do remember being particularly annoyed with the introduction. One thing Rowling can do, is write simple child detective, coming of age literature. One thing she cannot do, is write like Tolkien. Lets just say she tried to write like Tolkien to start this one off. I also did not appreciate how Harry was forced to compete in the tournament as the result of, essentially, some lame rule. The danger he was put in did not strike me as realistic and so the world fell apart in my eyes. 3/10
Order of the Phoenix
As I recall Harry is held back from understanding "what is going on" for ages and ages, and when he finally "finds out" there isn't much to find out, nor do his friends or anyone treat him decently afterward. I was disappointed when the statues did not come alive in the movie, since that was the best part of the book. 4/10
I think everyone was disappointed when Gandalf er, Zedd, I mean, Dumbledore died. On the other hand, I was disappointed for unique reasons. I knew, was certain, at that point, that we the readers would never be exposed to the truly elite magic of the world Rowling had created. Dumbledore was the only portal into that sort of knowledge, and when he was gone all that is left is silly children tricks and love. When Harry also decided at the end of this book not to go into the seventh year, which is another obvious indication. 6/10
Either I had grown to expect too much, or Rowling was getting tired of writing. Quite frankly I think she got tired of writing the series. I am confident in this for reasons I cannot go into for the simple reason that I can't remember. However I feel I can often understand what an author is feeling as I read their work, and that is what I picked up, strongly.
I found this book especially childish (despite the overall theme of maturation throughout the books) and felt that the kids were in no way prepared to confront big V. Also, I think Rowling got a little obsessed with having her creations turn into movies, because this work was especially "theatrical". Goblin bank breakout, incredibly unnecessary war before defeat of V. It was too much and just plain silly.
The teleportation was just too much. It really makes me wonder why people did not do it more often when it was truly needed. Really what I'm saying here, is that in the last two books, we discover that Rowling had absolutely no idea what she was doing when she created her magic system. 4/10
I drew this on facebook graffiti: