I loved this film, but it wasn't perfect. (Spoilers beyond this point, for those who haven't seen it yet)
I'm still a little unsure of the much more upbeat and lighthearted attitude of the film. I know that's very much in keeping with the books, but it made the film seem a little childish at times. Also only a couple of the dwarves got any speaking lines (Did Bombur speak at all? I never noticed).
I loved Martin Freeman, he was fantastic, nailed the role perfectly, and Ian McKellen is as good as ever (although I don't think their magic post-processing anti-ageing cream worked perfectly >___>).
I thought the prologue was brilliant, it filled the viewer in with the backstory without being dragged out with too much exposition and name-dropping (which, let's be honest, can be a problem with Tolkien's works ).
Azog didn't really bother me too much to be honest, I have to say, I was a bit confused on the timelines so couldn't remember if he was supposed to have died yet. Since he should be dead I suppose it isn't perfect, but he looks brilliant and I suppose it's a requirement to have some bad guy around to keep the pace of the film up.
Radagast is probably my biggest complaint. Reminds me of a Disney character or something. I understand he probably was a bit eccentric, but I think it went a bit too far to be honest.
Talking of "went a bit too far", I never thought I'd say this, but I really thought the film was too long. To me a logical ending would've been when they escaped from Goblin-Town, you had the climatic finish to the film, and everyone regrouping ready for the next leg, but maybe that's just me.
I'm not entirely sure why it showed Gandalf looking ominously at Bilbo's pocket when Thorin asked him how he escaped. Surely Gandalf did not know it was the One Ring, even when Bilbo announced he had a ring at all, which he hadn't yet. Also, an unrelated point, but I loved the Trolls. They were great.
All in all, I loved the film, and I can't wait for next year now. In fact, I'm most likely gonna see this one again at least once while it's in the cinema. That being said, I have a little niggling doubt about how the other two will turn out (especially in the eyes of the critics, not that that matters for my personal opinion of the films of course)