"The Hobbit: An Unexpected Journey" - As a fan of Tolkien's works since I was a kid I enjoyed it, but not as much as the "Lord of the Rings" series. The reason is pretty simple. When Jackson did the "Lord of the Rings" series his vision of that world was almost exactly like mine. When reading "The Hobbit" I envisioned a much smaller (no pun intended) world, wherein the main character sees the world in much larger terms as the story progresses. In this first of three movies Jackson went for epic feel. Everything is huge, right from the get-go. Epic battles, massive scenery, the lot. It doesn't fit.
The scenes that he inserted, that weren't actually in the book, tend to work because they show what was hinted at going on, behind the scenes. The recurring villain is an odd addition but OK, whatever.
Someone who never read the book, unlike me, would likely like it better.