Just finished ripping 192 Dresden plate wedges because they looked wonky. Do not think that I never finished a quilt without redoing.
Not too long ago, cut an appliquéd Cavalier King Charles Spaniel off its background because I thought the muslin looked chintzy, after satin stitching it without matching thread. Put it on a different fabric; used invisible zigzag. There were still little pieces of the original cream background. After it was washed, they looked like fur, and multiple people asked how I got it to look like real dog fur. Of course, I made up a good story!
Moral of the story: almost any mistake can be turned into something good.