There was some interesting research a decade or so ago about how the delusional thinking from dissociatives often persists beyond the point where you feel altered. That's certainly been something I've noticed sometimes in my experiences.
Some dissos make me feel like I've moved into a clean, tranquil world, one free of pain and the burden of emotions. They don't feel at all emotionless at the time, but I feel their return almost like a physical pain. I could see myself becoming addicted to that clean, clear freedom from the burdens of embodied, material existence.
I was part of a research study that asked research chemical users to describe the experiences they had on different materials. I found it easy to express in rich and intricate detail how various stimulants, psychedelics, entactogens, etc. made me feel. When I got to dissos, my narratives became muddled and didn't do a good job of evoking the experience at all. The interviewer laughed and said that the same thing happened with all the other participants when they tried to describe them. It's just hard to bring stuff back and integrate it.
That said, I know several people that have had life changing experiences on them. Most have been with DXM, but I had one friend that was able to use the emotional distance of 3-MeO-PCP to impartially look at her history of abuse and learned to show herself the compassion that she would show anyone else that had been through the same.