I am critical of my work but I think it's more to the good than to the bad. I look for flaws in my work because I want to improve and I can't do that if I don't know what it is I'm doing wrong. Quilting, for me, is an adventure but it is also always growing and changing. If I'm not growing, I'm not having fun. That's just my personality though and I know many people who are comfortable with the skill level they are at, and I'm good with that too. I enjoy the challenge of mastering a new technique or improving on an old one. It's part of what makes quilting such an amazing experience for me.
Now I have learned not to point out the flaws in my work to others. Usually they don't notice them, but if they do then I know it is something I need to work on. And if the person looking at the quilt is not a quilter, I know they won't see any mistakes. You gotta love that! :-D