I recommend the rheumatological aspects such as checking for lymes, EBV, etc and autoimmune issues.
For me the deep long vivid dreaming sleep is rare, but I take it as a sign of powerful healing. Only two things ever do this-
taking melatonin after being very overworked and wired for days or weeks at a time
or doing a juice fast with things like cilantro, carrots, celery, and fruit
The day after you feel like your body really relaxed. But for me the issue has been trying to stick to a strict juice fast.
I have anhedonia as well, or the lack of dopamine and motivation. But tyrosine never did help me. Schizandra and rhodiola did- at first. Exercise works better than anything. And yes I find that it makes humor, wit, depth and excitement difficult to express.