I never quite had that feeling that I was living a redo of their lives, but I certainly felt like they put all their eggs into one basket, and that when I messed up, it was especially disappointing for them. I imagine if they had had the chance to have another kid after me, that they would have approached some things differently. They both grew up through the 60s and 70s, so they took a bit of a laid back hippie approach to parenting. If I'd had more structure, I don't think I would have disappointed them quite so often as a kid. But if I'd had more structure, I wouldn't be who I am.
Being an only child is definitely a very different way of growing up. Throughout most of my life, I didn't know many other children at all who didn't have a sibling. Typically in every class from elementary school to high school, I was the only one. Always nice to talk to another person who understands. Thanks so much for reading and for the comment, Chris. And so sorry to hear about your dad!