I've thought about this, actually. I have some regrets, or more just some situations I would have liked to avoid (one my fault, one not).If you could go back to your teens and change your life, would you?
Keep in mind that change probably would mean you wouldn't have the kid(s) you now have.(any change sets a new/different path)
But at the end of the day, I'd say no. It's almost impossible for me to risk my current kids on the chance I might get hypothetical ones I love as much, to be honest. And I survived the experiences I'm talking about, so who knows if they scarred me or made me stronger. Both maybe?