I love your D9P kitty quilt. I don't see any mistakes but I think we are all very hyper-critical of our own work.
Mistakes that we make on our own are glaring to us but most of the time, no one else sees them unless we point them out.
I don't know if we ever get to the point where we think our own stuff is good, we love everyone elses stuff but think our own work is not up to par.