I tend to not show people anything until it's between drafts. When they point out the faults I either discard them because "the critic didn't understand what I was doing" I write it down and use it when I start on the next draft. I think people telling you where you fall short is a good motivator. If criticism kills your motivation than you're probly not cut out to be a writer.
I've never been a big fan of that. I need structure when I'm writing.