Depends. I did a quilt a while back and did not post pics here because it was one of those no pattern things and I know there are heaps of things I could have done better. If I hadposted and you had pointed out those things, I would not have been happy.
But then again, I am working on a serious quilt as well and if you saw a fixable error in that I would definitely like to know, as I would surely notice it myself sooner or later and then it would bug me anyway!