yes
Yes, I do know about the ones you wish you could do over - it doesn't matter the camera. There have been a few that I wish I'd been stopped down for that I wasn't or the ISO could have been at a different setting....
The third photo was at the Farmer's Market at the Ferry Building in San Francisco a few years ago taking a class on street portraiture. The first was a grab shot of a client's son. I went to shoot his newborn baby sister and couldn't miss taking at least a few of Dillon. The 2nd was a project I did for myself. I was shooting a paid event for someone and decided to do portraits of the kids - it was a company picnic for a large medical facility and what the event company wanted was wide shots of the fun stuff. I did those as they asked but then I did the kids for me.