I'm working on getting out of that habit. I used to have a really unhealthy tendency to be an imperfectionist* and I'm working on accepting that my quilt won't be free of every error, if there's a little bit of puckering, I can quilt that out, and no one else knows that it's not how I meant it to be.
*My friend redefined perfectionist to imperfectionist. So someone who sees every little mistake, rather than being a "perfectionist", they're actually an "imperfectionist" since they're focusing on the imperfections. I like that definition and rephrasing :)