Listening to music in a completely dark room seems/feels weird to me. I have never gone to a concert played in total darkness, so hearing music that way seems a bit odd. The few times I've tried it, I just got sleepy :)
I like low light and I take my glasses off. I don't close my eyes when I listen, and when I take my glasses off, visually things get blurry but the sound snaps into focus and dimensionality.