Cool post! I've also been thinking about this for a while and agree with your advice. Have also been on both sides of the fence and often feel "out of place" sharing my project.

However, I try to ask myself, can a really contribute value in this conversation first - which is probably what motivates anyone to leave a comment. And if yes, I try explaining by adding an example using my project. This way I try to block myself from just promoting into any conversation in an unnatural way.