All these things that were done can be seen as stepping stones to where we are now as people. For instance, the tattoo I got a couple years ago was appropriate at that time of my life. Right now it may not be appropriate but that does not mean I regret the decision to get it. It was appropriate at the time it has been an instrumental part of who I am and where I have come from.
I think what can be taken from this is that regrets are made up in our heads. We don't need them. We need to embrace our past decisions, good or bad, as instrumental in becoming the people we are today.