Nearly every night of my 64 years of living I have slept soundly. I sleep peacefully for 6 to 8 hours every day. I am not conscious of thinking much while sleeping, except when I remember having a dream (which I seldom do). I am calm and still while I sleep. My experience of sleeping is one of a quiet, peaceful, pleasant, restful, and satisfying experience. I seem to be in a state of relaxed unconsciousness, but can wake up fairly easily if the need arises. Generally, I am untroubled while sleeping, don't worry, don't seem unhappy, and don't harm others. I don't mull over problems, philosophize, plan, or fret while sleeping. When I awaken from a sound sleep I feel refreshed, restored, rejuvenated, and good all over.
The reason I bring up my sleeping habits is to point out that many of the meditation techniques I have studied for the last 50 years assign a purpose to meditation that I have already achieved while sleeping: not thinking, no preferences, non-dualistic, blissful, peaceful, re-energizing, pleasurable, etc. Or, meditation experts describe a method or procedure for meditating that has many of the features that I already embody while sleeping: remaining still, being calm, breathing regularly, closing one's eyes, relaxing, etc..
Since I already spend up to eight hours a day in my blissful sleeping meditation, maybe this is why I have little interest in spending many more hours in seated meditation during the day like I did a few weeks ago at a Taoist Retreat of the American Dragon Gate Taoist Lineage. Enough is enough!
Let me think on this a bit more and I will write later.