I thought it made for great dramatic conflict for Porter's girlfriend to decide to leave the territory, to get away from the turmoil she felt with him there and to settle down with someone else. So I liked it when Brigham Young interceded and helped her to see the value of Porter Rockwell. The antagonists are all portrayed pretty well, and you can't help but pull for Porter through the whole story. I really liked the music at the barn dance. The fast music makes the dance come alive - all the folks having fun after the tough trials they have gone through so far in the story. I also love the slow music at the dance as Porter and his girl pursue their courtship - it is a beautiful scene.
I like how everything is resolved by the end of the movie. Good climax.