Do you listen to your music with your eyes open or closed or a combination of both?

When listening to my good system it sounds best at night, dimly lit room (candle or recessed light at most). Also project a " party" light projector behind stereo rack on front wall.

Not crazy disco light, but enough to give "life" to the front wall. Takes the eyes focus off speakers and helps my ears focus on the music. For me, soundstage and instrument placement improves.

I hang out with a questionable bunch of characters. 

Eyes always open.

An enhanced experience with glasses off, eyes closed and dark room. But then I wake up to the sound of the needle skipping against the center label. 

Late night into early morning is best.

Mostly closed with dim lights. I like to be in the acoustic space the music offers and looking at my room distracts from that. But every few minutes I'll open them to make sure the boogie man didn't sneak in. 

Usually opened, in a slightly darkened room. 

For me, nothing really changes as far as imaging and soundstage, whether my eyes are opened or not. 

Also, my ability to become fully engaged in the music does not change.