I guess I've been able to depersonalize and observe my own thoughts since I was a kid, so whenever people describe these experiences, I just don't get it. It's normal for me to detach from my own identity and experience, so I don't understand how people find it so alien. There are various levels to it for me, so I would guess that others just don't enter the somewhat shallow levels I normally swim through. I dive deep sometimes, but other people probably plunge deeper than I do with much less experience.