Normally I would say nothing as I believe that everything that has happened to you brings you to the point in your life that you are at, that being said, one and only one thing I would change, I would have found my love much sooner.
If you could travel back in time and change something what would it be?
A regret that I wish I could go back and fix.
It can change the future example you wish that your older brother/sister never born. You travel the time that your mother and father is on the hospital waiting for the result if your mother is pregnant, you change that your sister/brother never born. And you came back to the future looking to your mother and father fighting always for no reason. If your older brother/sister is alive it can stop your mother and father fighting each others heart. You can change the past, but it can change the present or the original life of your feelings
Traveling back to time is impossible, but if it was possible we could change our faults in our life and make the life pretty good...
my obsession with movies. I would tell myself never to get obsessed with them and I would get rid of all my VHS movies!!!