It seems I misunderstood you. With all the focus on private property among libertarians I thought by the frase "self-ownership" you meant owning property or production.

I totally agree btw. In fact it was one of my earliest core principles thought up in late childhood (10-12 ys. old) that the only thing I truly owned or would ever truly own was myself.
My big ideal at the time was Conan the Barbarian. Not for his physical strength, but for his strong will to protect his own life over all else, and for his relationship to his god Crom (Crom makes no demands and gives no help. He only expects you to be strong on your own).

Anyway I still think like that, more than 20 years after getting inspired by a comic book :p