I don't think the show did a very good job with Bran's story this past season (other than "The Lion and the Rose," which, unsurprisingly, was written by GRRM), but Bran's journey has been one of my favorite parts of the show. I think the first few seasons were the most powerful, as we still saw him with his family, and at Winterfell. Isaac Hempstead Wright added such emotional power to scenes like Bran begging Theon not to kill Rodrik. Even last season, when he had to tell Rickon goodbye, we saw some of this. Season 4, there was his almost seeing Jon again, but the rest was a little too disconnected emotionally.
I sometimes hear people say Bran is arrogant or that he uses the people who are with him, and I can understand that to a point, but he's also a boy who was slowly but surely left behind by everyone he loved, and now only has an identity based on prophecies and what he thinks destiny wants to be. He had to make that break once and for all when he left Jon behind, and I wonder how much of his humanity will be left.