I finally saw OotP yesterday and I'm finally able to submit a review!
One of the things I was impressed with was the acting ability of all the actors (both old and new). Kingsley is now my new favorite Order member (after Tonks, of course) and Helena Bonham Carter captured all the craziness of Bellatrix absolutely perfectly! Umbridge was absolutely evil and exactly as how she is in the books, and Luna was dazed and dreamy, so all in all, I was impressed with the new actors. The old ones were quite good as well; their talents keep growing with every film. I thought Dan did an excellent job with the emotional scenes and the possession; Matthew Lewis also impressed me with his emotion in this movie as well. Rupert, as usual, has the funny one liners, as even Emma is starting to get her know-it-all personality back from the first film.
As for the things I liked and didn't like:
Things I really liked:
-The tapestry in the Black House. Not like I was expecting, but brilliant nonetheless
-The DA scenes. Just like in the books, with Neville struggling to do the spells, Hermione mastering them at once, and Harry's leadership skills. Maybe favorite scene was probably the patronus or the fight between Ron and Hermione
-Fred and George. They were hilarious throughout the whole movie, and sweet in that scene where a little kid has just come out of detention with Umbridge and they're trying to comfort him...
-Weasley's Wizard Wheezes products were amazing! The extendable ear scene was particularly funny..."Hermione, I hate your cat" made me crack up!
-The scene where the trio is discussing the kiss. I love how Emma just starts randomly laughing and gets everyone going.
-All the little ship hints in the movie: Harry/Ginny, loads of Ron/Hermione, and, perhaps, a few Neville/Luna (thats more of me hoping that JK will include that in the final book).
-Evanna was the perfect Luna! I was sad that in the movie she was more obsessed with Nargles than Crumple-Horned Snorkacks, but she still top notch, with her ears and huge eyes and weird clothes and skipping around everywhere...
-Kingsley's comment after Dumbledore escapes: "Whoa. You gotta admit, Dumbledore's got style." made the whole theater laugh.
-Harry's comment to Umbridge as the centaurs are taking her away: "I must not tell lies" caused the theater to applaud.
Things that made me go "What was THAT?":
-The fact that Tonks has only, like, 3 lines in the whole movie
-Devon Murray's acting. I'm sorry, but after doing 4 movies, the emotion should come out better, as opposed to one long run on sentence with absolutely no tone change at all. Maybe I was just expecting too much.
-The Department of Mysteries scene. I would have expected more action, or even the circular room, but most of that was cut out. And Sirius' death was unimpressive to me. He gets Avada Kedavara'd and then poof...he's gone and Harry's ready to kill Bella.
-Harry pulling his wand out in front of Dudley and his gang. True, his gang thought that it was a fake wand and Harry was crazy, but still, Harry should know better!
Things that I thought were cute additions to the movie:
-The fact that Neville finds the Room of Requirement. (The writers seem to like cutting Dobby out of the movies and giving Neville his role instead. Not that I mind

)
-The letter that Harry gets from the MoM annoucing his explusion was very cute and also very Howler like
-Grawp having a crush on Hermione and giving her the bike handle. I also like when Ron runs at him with a horrified expression on his face and tries to hit his leg with a branch, only to have to break in two and have no effect whatsoever.
-Fred and George apparating around just to annoy people
-Kreacher. Yes, I know, he was only in it two times, but the two times he was in it was perfectly canon Kreacher.
All in all, the book was much better than the movie, but I still enjoyed it. I give it an
8/10