Good question B & B, it's changed me in more ways than I can list. On one hand I feel it's jaded me, I used to take people at their word, now I watch for actions. On the other hand I'm much more empathetic towards others. I've always been involved with various charities...but since dealing with my son's addiction I listen more intently to the stories and look more for commonalities than differences. I know how much it has helped me to be able to share my challenges, So if I can lend an ear, or offer comfort to strangers, I do it now without hesitation.
Your post reminded me of a conversation I had with my son early in his addiction. I was telling him how I prayed for the right people to cross his path. To help him learn the lessons he needed in the least painful way possible so that he could move forward with grace and a productive life. His response "have you ever wondered if I'm your teacher"? And yes, he most certainly has been. Still learning.