I'm watching a Morrowing playthrough, and I just learned a few weeks ago that the music in Dragonborn is from it.
"Oh this is the soundtrack in Dragonborn!"
"No, wait, it's the other way around..."
Not to mention empty. When I finished Dawnguard, I felt more like a Falmer destroyer than a vampire hunter. I think they went about it all wrong. It was still fun and interesting at times, but they just went overboard with the Falmer stuff imo. Hardly any vampires.