I am a massive fan of the books, but most of the films have been a disappointment for me (with the exception of the goblet). Therefore, I never really have high expectations for the new releases. I thought that maybe, seen as the film was in two parts, it could be a big improvement on the previous installments, but I wasn't too hopeful.
However, after seeing the film, I was pretty amazed. It was almost exactly how I imagined the book in my head, with a few improvements which I didn't predicts. Most people I know complained about the lack of action, that it seemed to drag on for a bit. I knew that the first part would be like this, a build up to the events of the second half, so I was pretty pleased
This was the first film in which Daniel Radcliffe didn't annoy me greatly, and I really felt like the main characters had their parts fleshed out fully for the first time, more or less. Some of my favourite bits:
The destroying of the Locket. Possibly my favourite scene in the film, it just seemed so much scarier and important than the books ever made it appear. The effects were amazing, the way that it targeted Ron and his darkest thoughts worked much better than in the books, the part that Harry and Hermione played was so much better, and really helped me to realise how much more adult these films had become. Minor criticism - they didn't explain how Harry knew to open the locket with Parseltongue - slightly annoying, as it did not seem like he had worked it out on the spot, but he must have done, otherwise it would have been opened earlier surely?
Hedwig's Death. The scene was so much more poignant than it ever was in the books, and it was the right way for Hedwig to go. In the books, dying in its cage reflected how useless Harry and co were against Voldemort, which was good, but the way that Hedwig died for Harry was amazing, and fitting for such a good character in the books. One of the saddest deaths in the film, by a long shot.
Charity Burbage's death. This was the only death that made me cry in the books, and I loved the way they kept it in the film and played it out. It is a terrible way to die, not to mention being consumed by a snake afterwards, and it really, again, showed how the story had matured, being one of the first scenes in the movie. It also made me appreciate Snape's character much more, how complex and twisted he is. The most moving scene, for me.
Minor mentions:
The fact that the jokes actually made me laugh for once, in particular, George's part when Harry and Ginny kissed.
The animation for the Deathly Hallows story - very inventive and nice to watch.
Harry and Hermione's dance. I've seen a lot of hate for this scene, but I felt that it showed that, firstly, Ron's jealous feelings had some grounding, and that Harry and Hermione are also extremely good friends, not just Harry and Ron and Ron and Hermione, as it appears in the books. It was awkward to watch, but it was necessary, in a way.
Xenophilius' and Luna's dance at the wedding - need I say anything?
The use of Dolores' patronus at the trial.
The 'Magic is Might' statue.
Minor annoyances:
I did not like the actor chose to play Bill, not at all how I imagined he would look and sound. His scars should have also been more prominent.
Dobby's death - one of the worst scenes of the movie here. Dobby came across as weird, and I wasn't moved at all. Also, I didn't like the fact that the knife followed them through that small vortex, I would have much preferred it is Dobby had been stabbed before, but I suppose it made for good tension for those who did not know about Dobby's death.
The skipping out of the preparation for the Ministry. The film did not show the amount of planning that should have gone into the raid, and made it seem easy and spontaneous. Without the amount of planning shown in the books, surely they would have been caught? This also meant that their relationship with Kreacher was not shown, and, as a knock on effect, we won't see Kreacher leading the house elves out of Hogwarts at the battle D:
Overall, an extremely good film, and it left me in major anticipation for the next film - I do not want to wait for half a year!
EDIT: Cannot believe that I forgot the Hermione torture scene!
Easily my favourite scene in the story, forgot what I said earlier. So emotional and heart wrenching (especially because I love Hermione). I especially loved the 'mudblood' carving in her arm - racial hatred at its best. Amazing scene.