The imperfections I don't want to live with are too-narrow seams. I want my quilts to stand up to multiple washings because they are well used. Seams that are too narrow are subject to coming apart. I've also learned to use good fabric for longevity.
All this said, I still have lower quality fabric that sometimes finds itself into a quilt and there are times I find myself considering how scant is scant or just not enough.