I wouldn't change a thing. Ever.
I am who I am because of the pain, struggles, and failures I have experienced. Only through such difficulties have I become a better person, and to go back and change those things would mean that I am not happy with the results.
I am happy with my progress, and while it hurts to be beaten, deceived, and discarded, I wouldn't change those things if it meant that I would have to remain ignorant to the nature of our world and the people who I have allowed into my life.
I would choose to repeat every mistake again, suffer every deception and injury, and retain myself as I am.
I like who I am when I look in the mirror, and I like the fact that I never have to create alternate realities when I post answers on Quora, or pictures on Facebook. I like the fact that I never have to ask anyone to keep my relationship with them a secret, and out of the public eye.
When I post a picture of my grandchildren on Facebook, or relate a core belief on Quora, I have no fear that people who know me IRL think of me as a hypocrite, or a liar. When I say I believe in honesty and integrity, no one who knows me, can seriously doubt me.
I know this, because the things I have gone through have shaped the foundations of my beliefs and I would not want to change that.
Ever.