What you call "astral bodies" can exist in one or more of many states of being. there is the shadow, or "shade", the mind or intellect, auric places, etheric planes, energy, substance, light, dark. The ancient egyptians had three selves that could be considered astral. (Ka, Ba, and Ahk) what a siberian shaman or norse Seid experiences will probably be different than what a new ager experiences. The classic modern astral experience is usually of having flight and being alone on your own plane. Note that the astral world is different than the dream world. Perhapse it is liminal, although that could just be the lower astral planes.
Hope this helped!