There is a story I know about one person that was extremely afraid of dogs. He was hypnotized, and during the therapy it came out that in a past life he was bitten by a dog. The therapist was able to put some kind of cover over this, and after the hypnosis he was able to approach dogs without a problem.

Just like the dog that had bitten him in a past life was not evil, but still a combatant, it is likely that people you sense negatively about right away were your combatants in a previous life. Maybe.

I read also on a post somewhere here that there is a theory that a birth mark may actually be the entrance wound to whatever killed you in your past life. that would be interesting. I have a son that has a birthmark right below his heart. Must have been a soldier . . .