Oh, this is kind of beside the point, but

1. Be 16 again
   
2. Do what I wanted to do then: be an actor, a playwright, spend my life in the theatre

(Maybe with metempsychosis, but I'd probably come back as a cockroach.)

As for you, young Nomad, look after 17, but be more ambitious. Write something that makes grown men cry for joy.

And 20's wrong. You don't become a father at some point. It takes much longer.

(Old fart shuffles off.)