That was pretty much the coolest thing ever!
Well, for a Harry Potter movie anyway. As in I thought it was the best one so far and didn't suffer from the disjointed too-many-short-and-rapidly-changing-scenes-for-three-hours that GoF did
umm... The trio... Emma Watson. She can't rly act, I'm sorry, I'm sorry, but it's true. The other 2 kids did pretty well I think especially Dan. It's not their fault there's fark all character development of them beyond the basics. There was too much Umbridge, it's like the film's all about her, as great as Imelda Staunton was. Needed more Maggie Smith & Alan Rickman & Emma Thompson. The Order ppl were also pretty good (omg tonks is hot) and there wasn't enough of them either, same for Lucius Malfoy
The poster of Fudge in the MoM is totally reminiscent of Hitler, like seriously you can't look at it and think of anything but nazi propaganda posters. Dudley's gang were so lame lolz and the dementors are all wrong. I liked the younger Snape/Marauders but the scene was too quick to see much of them
It's rly true to the book in spite of having to leave a bunch of shit out, all the changes don't bother me even as someone who's read the book a dozen times, plus they managed to include a few little unnecessary things that were nice like the 'bulletin board' scene at the end
I didn't like what they did with Dumbledore, I mean Michael Gambon was good and all but his lines weren't that great and the exit in his office and the duel with Voldemort weren't as impressive as they needed to be... they needed to use more of the book like how he knocks people out or animates the statues to absorb the AK's (which voldemort never seems to think of using) The Weasley twins' departure was pretty good but it would have been perfect if they'd included the swamp somehow. Oh and Sirius gets AK'd which is just all wrong.
Otherwise... the thestrals and grawp and the centaurs looked pretty cool... lots of humorous moments (sometimes the serious moments were funny too and I don't know if that's intentional or we just find it funny because of being fans of the book and knowing more than the characters do at the time). And also shippy moments, lots of those, like R/Hr is put on pretty heavily throughout the whole thing which is nice, Harry and Cho's relationship consists of a few looks and a kiss, and sometimes when they're looking at each other you can see Ginny is not pleased which was nice.
The Dumbledore's-speech-at-the-end was the weakest yet and they didn't divulge all the background info that he does in the book beyond the prophecy meaning harry or voldemort has to kill the other, which might be a good thing since it doesn't weigh the film down with too much information