I love soundtracks. Whenever I'm working, or writing, or anything else that requires concentration, I'll put on a soundtrack. I'm especially fond of videogame soundtracks which, by design, stimulate mental activity while remaining in the background. So I listen to a lot of music, but I don't know a lot about it. That's why I was really excited to find the youtube channel, Listening In. I love when I can find a resource that explains why I like something. The video is well designed so that even though I don't understand all the technical aspects, I still understand the points he's making.
For example, this video on the monster themes in Lord of the Rings. The thought of taking something as complex as a character, and distill the essence of that character down to a few notes in a theme is amazing to me.
It's such a fascinating element of storytelling and Listening In does a fantastic job of explaining how it works.