I post pictures of my 'stuff' because I want feedback. I'm a good quilter.... not the best but not the worst either. I certainly can look at my work and pick it apart when it's needed. And that makes me work harder to improve all the time. But, having someone say, 'your work is beautiful' puts a smile on my face. Having someone say, 'I like the blue border instead of the grey one' helps me make a decision ( even though there will be plenty of people that like the grey better). And, getting 10 different ways to do something helps me discover a 'better way'. So, yes, I enjoy people's comments.
But I'm guilty of not commenting sometimes, too. Sometimes, I don't know what to say, I don't want to say something that might hurt anyone's feelings, or I see that others have already said what I'd say. But, I'll try to change that because, you're right. We do need to encourage each other. That's why we're here on this board, right?