All in all, I am happy with how my life turned out.

I would be tempted to explain to myself some of the facts of life, like how to talk to women, how to behave and to date the eautiful redheaded girl who -with hindsight- practically begged me to call her and ask her on a date. But I love my wife, and I love my baby girls even more. So I wouldn't change what went before because I might never have met my wife (otoh I believe we were meant to be together).

The one thing I regret to this day is that I really hurt someone's feelings when I was still a young twerp.
I would tell myself to not do that. Then again, this regret changed me in the long run and taught me something very important.

So all in all, I would probably look at me from a distance, occasionally mutter something, shake my head and console myself with the fact that it would turn out allright.