Hi Psychee, Great question. What are we made of anyway?
I do believe in reincarnation. Sorting is an adventure in puzzleland. Which bit goes where in the greater scheme of things?

I feel like I connect with, or am repelled instantly, by people I have a past life history with: stuff left over, to finish up, in this life. Good and bad.

I haven't done regressive therapy, though I've read about it and how it can provide breakthrough contexts for healing.
Mostly I want to say, I don't think there's any "one way" to all the answers. And, that answers tend to pop up when I least expect them! The important thing for me is to be more and more open and listening to myself to find my own truth.

I hope this made at least a little sense.