When I started my commercial embroidery business, I too was very critical of my work. I quickly learned to keep my mouth shut and let the customer point out the problems as I saw them. Had VERY FEW say anything and if they did it was something totally different from what I was fussing about. Lesson learned. Most of the time they gushed about how wonder, how great, etc. and all I could worry about was what I perceived as my boo-boos.