I believe reincarnation is certainly a possibility. I rule nothing out. I think our little human brains are far too puny to ever begin to comprehend the way things really are in the universe.

I think there are a lot of things to learn, know, experience, be and overcome in the world. There is no way to do even a tiny percentage of them in one lifetime. Maybe we keep coming back until we learn what we need to know, or until we get it right.