If I was it would be nature sounds like a babbling brook etc. I had a little machine that played different nature sounds and eventually it stopped working, it was very relaxing to listen to.

I listen to scary podcasts, it helps me sleep 😂

I listen Christian You-Tubes or sermons until I turn around and my computer falls to the floor and wakes me up 😂

Nothing really sleep or brainwave specific. Just an oldies station or talk radio on low in the background.
Sometimes an ambient noise youtube clip or something.

Lol. I listen to select meditations off of Insight Timer. I have tried binaural beats, but there’s nothing more soothing than a beautiful woman’s voice.

I sometimes play sounds of pouring water or waves and it helps me calm

No...

Half a page of Dave Cameron's autobiography often does the trick

Mostly metal music. Helps calm me down.

Nope.

I just nod off.

I fall asleep to the snores of my husband