>What does it feel like when you are tired/relaxed, lying in bed, eyes closed? Do you get visually dreamy, half-awake?

When I'm tired, my inner dialogue is usually less active than normal, though it's never quite silent. It's more of a difficulty focusing on the streams of consciousness that slowly fades over time until sleep takes me. Sometimes, if I'm fading in and out of consciousness, I will have some imagery, but as far as I can tell, only when actually sleeping.

This can result in moments where something vivid happens in a dream, like a car crash, where I suddenly jolt awake with my heart pounding rapidly. However, I can't continue to imagine the visuals of what happened. I just know that I dreamed I was in a car crash.

>What do you see when you close your eyes? Only ever Eigengrau?

If I'm in total darkness, only Eigengrau (thanks for the new word btw!) but if I'm in light, I see kind of a reddish hue that is from the light passing through my eyelids I assume. There are no visuals associated with the eyes closing in a conventional sense. The whole "counting sheep" method of falling asleep never made any sense to me because I didn't realize that people could literally visualize sheep jumping.

>Have you ever done psychedelic drugs? Opiates (medically)? Melatonin, Z substances, ...?

Unfortunately, no. I'd love to try some, but in my field of work I have to maintain a security clearance so taking drugs could compromise my job security. In the past, I have been on a cocktail of anti-depressants + anti-anxiety medication that caused me to have vivid auditory and visual hallucinations, but those were with my eyes open, so it just seemed real to me. As soon as I mentioned those symptoms to my psychologist, I was immediately taken off the medications they put me on.

>Can you picture memories at all? Can you picture pictures?

I can't picture memories at all, but I can describe things from my memories. The way I process them is very strangely abstract. There is no visual portion to the memories at all. For example, as I mentioned in another comment, I can't picture what my parents look like, despite having had lunch with them yesterday for Easter. I can describe certain details about them, and have very pleasant associations with them, but I simply can't picture them. The descriptions I could offer up would be particular details I've explicitly observed and remembered about them.

I can't picture pictures either. If someone were to ask me to visualize an "apple" no picture appears, even if I spend a decent amount of time and effort trying to construct a visual. However, I can describe elements of what an apple is. It's sort of like the concept of a platonic ideal of a thing. I know attributes that are associated with the platonic ideal of apple, so by extension I can describe an apple. I just can't picture it. There's no visual reference in my processing for any element of internal thought.

Thanks for sharing your experiences with your visualizations! I'm kind of the opposite. My mind is constantly yapping and I find it hard to fall asleep at times due to the persistent monologue in my head. I tend to listen to podcasts or Youtube while I fall asleep because it lets my mind be quiet and get ready for sleep.