If I was given a second chance, I'd probably seize the opportunity to reverse a past error in judgment. I wouldn't want to pick something too early in my life, though, or I imagine too much would change that I'd have a hard time adjusting to the reverberations of that alternate course.
I wouldn't have lost my virginity to my ex-girlfriend (seeing as she turned out to be unfaithful). But, then again, that experience will inform my choices in the future. It goes without saying—(but I can't help but be redundant)—that mistakes make us wiser. I get to decide what I take from an experience. I’m the one who gets to decide what’s right for the next choice.
It’s good that we regret (as long as we don’t dwell on it) if that means acknowledging a problem to avoid. Our judgment evolves due to our self-criticism or what we could title “retrospective or hindsight judgment.” I’m glad second chances don’t work that way (although I feel like we still get second chances in a way).
Thanks for posing the question,