I've never experienced a past life of mine. Though I do have theories on what I was in my past life, based on experience on this one.
I have a belief, that the people you know in this life, that are close to you and you are well bonded with, were with you in your previous. They may have not been the same character, but they were the same actor. Like in this life, your mother, could have been your sister in your previous life. I have two friends, who one I believe was my brother in a past life, and he agrees with it. The bond between us... its like a family bond. I have another friend, I think was my partner, I think I was a police detective in my past life and he was my investigation partner.
I'm a naturally born sleuth, I'm great with puzzles. I have a huge interest in unsolved crimes. I like to look up missing persons, cold and unsolved murder cases. I've always enjoyed this, even when I was a kid. I think the things you did in your past life, you carry to this life.