Stirring incidental music
e.g https://www.youtube.com/watch?v=1m2Q1jAy92Q
I think the reason they have such stirring incidental music, is because the actors are all performing people who typically have no expression on their faces, and usually have monotone voices. It's hard to get a dramatic scene out of someone who's performing that role, so they supplement it with great visuals and stirring music.