This is a great topic Debbie ... I love pondering these thoughts!
As I eluded to, I truly don't think I'd change a thing. It's something I've spent a lot of time thinking about (and I thought I was the only one, LOL).
But really, "who" would we be, if we were not the compilation of all our experiences past, every moment of them ... the good, the bad, the ugly. There's some things that I think, knowing what I know "now" (being older and wiser) that I'd wished I'd done differently in hindsight, but does that mean I would/should change some of those "bad" decisions if I had a chance?
Through all my own ponderings, I guess the conclusion I keep coming to, is that I would "not" change anything. Some of those decisions really shaped me. Were some of them stupid and hurtful to me? Sure ... but did they benefit me in some way, in the long run? ... you bet! Older and wiser ... I think that's how we get there, to that phrase. I sure wasn't wise in my earlier days (and I still may not be) ... but I sure learned from some of those mistakes, and I continue to apply that learned knowledge to current issues. Love this topic!