I think OotP is one of my favourites because of the fact that the books seem to continue more like sequels to each other after OOTP, if that makes sense. I know it helps to have read the whole series, but if you just started from the OotP, you can get along with the rest of the series alright.
I have to agree with nevillesgirl, on this point, that Umbridge is by far my favourtie character in OotP, because she is just so vile. As far as twisted characters go, she is the best.
I also have to agree with ChannelingGinny that lisenting to Harry complain about everything really annoyed me. What also annoyed me is the fact that he doesn't seem to trust anyone except for Ron and Hermione, and that just annoyed me. I'm not sure why, and it might be the fact that I always thought Harry was a very trusting character, and in OotP he's not. Another thing that annoyed me about him was that at the beginning, when he arrives at Grimmauld Place and he shouted about how he had gone all summer without a scrap of news, I was kind of like, well, you've gone summers before without any news, why is it bothering you so much this time.
I also think that they missed out a lot in the film, and could have done the film better, but personnally, the death eater scene at the ministry is one of my favourite scenes. The thing that really annoys me in that scene is the fact that when Harry and Sirius are fighting Lucius, Harry can do non-verbal spells, when a) he's not meant to know what non-verbal spells are yet and

in HBP there the thing that he really struggles with. Another thing that annoys me, throughout the whole film, really, is that they're not meant to know Levicorpus yet, but they do, and, they don't do it right, because in Levicorpus, your meant to be hoisted into the air by your ankle, like Snape is in his memory, but when they do it in the DA, they kind of float, and I'm like, if your going to do the spell they don't know yet, at least do it proparly. Sorry, I get quite het up about things, sometimes.
Lottie
xxx