Similarly, how he violently saves Thorin's bacon makes him a bit different from the Bilbo we see in the book.
This was the one thing that
really bothered me both times I've seen it. And will continue to do so with each subsequent viewing. Because, frankly, it's a complete reversal of one of the main themes, both of
The Hobbit, and
The Lord of the Rings.
And, to make it even worse, it didn't add anything to the movie, anyway! They had
already just established that Bilbo was earning Thorin's respect with the previous scene's explanation of
why he was still with them.
And they had just gone through great lengths in the scene before
that one (the most important scene in the entire novel, in my opinion--which the movie did
perfectly) to establish that Bilbo was capable of being placed in a situation where it seemed he had no choice but to kill (in both the book and the movie, Gollum was blocking his way), but found a way to avoid it anyhow. And, as tLotR (and Gandalf, earlier--and unsubtly--in this movie) points out, this was absolutely the right thing for Bilbo to do.
It is
very important for the character of Bilbo that he is
not violent like the great heroes of the world (and even Gandalf). The decision to place the Bilbo of the movie in a situation where the actual best choice for him
is violence saddens me, because, for the rest of the tale, no matter how excellent an actor Martin Freeman is (and he is), he won't be playing the same character as the one the book was written about.
The rest of the movie, though, I enjoyed even more with the second viewing. Especially the songs. They only left out one I wanted to hear. And they also left out one I definitely didn't want to hear.