Many people say we pick who we are but that seems a bit illogical. Firstly many people suffer greatly during their existence in this world, how many people would pick to live for instance in a life where they get abused by their parents for instance.
Why illogical? It's the most logical thing to me. Go in, live, go out again, analyze, plan, go in again. As regards negative experiences, yeah, that is sometimes hard to understand and swallow. It is said by many (e.g. hypnotically regressed people) that the Higher Self has a 'different overview' (to quote Monroe) about these things. It is also interested in negative experiences and problematic constellations as it would otherwise not be a challenge and learning experience.
Secondly if I am not mistaken every body should have a soul so how about if no one wants that 'life' which is being offered does that mean that person is created without a consciousness?
If there weren't a body to be occupied 'in time' then I assume it would be a deadbirth. I don't believe in zombies.
'Soulless' persons, if they exist, down here might be holographic projections. It's all just manipulation of energy. Probably, our 'bodies' here are all holographic anyway, as might be all you perceive here with your consciousness. So the difference is probably not as heavy as one should think it to be. Just speculating, of course.
However, I think there is always a waiting line and no body not to be occupied. Souls actually queue to be incarnated. At least that is what all of the hypnotically regressed people or some APers, such as R. Monroe, tell us. Here's one of his talks and what he said about these 'waiting queues'.http://www.youtube.com/watch?v=pCFWoBS1sKk#t=4m30s
It also shows another reason why souls might 'accept' rather negative lifes with lots of hardships. It's for the simple reason that the 'good lives' with abundance, freedom and joy might be more scarce than we think. Plus, some younger souls or 'first timers' might be naive and not have a concept of what suffering is.