I comment to hopefully make a difference by leaving my "footprints" upon a solicited for piece of poetry. There's a reason why you can select 'no comments' and that's completely understandable. I never question anyone's set preferences for their wanted feedback.
Feedback in friendly or of honest critiques are optional to add as a choice upon your individual page. Available as a selection, in my opinion, in hopes, that we'll grow as a writers and perhaps personally from another's input, point of view or someone's ability to reach in and touch us in a way we hadn't been previously, with possible astute and eloquently stated observations. I believe comments connect us together in a way that's important for self reflection, writing development, hilarity, and resonation. (and so many many more reasons, too, I suspect)
Personally, I write comments for as many poems as I can, because I feel it's important. If I'm moved emotionally or impacted in any way by a writer, I leave comments for them of my explanations. I like to think that it's helpful, maybe of some use to them and my hope is, even enjoyed. I too, think "How would I want feedback to appear on my own page?" and I go from there with whatever personal insight I can rightly covey.
I do try to focus on new members and perhaps poems that aren't read as much. I even work on that reading challenge as well.
It's beneficial for me to discover new styles, thoughts, ideas and opinions that I normally wouldn't come across.
I don't look at leaving comments /feedback as just structure enhancing, it's morale boosting and community building, in my humble opinion.
Yes Bluevelvet!!!! This is the type of response and attitude I was looking for in this forum debate. You have hit this subject square on the nail. Commentary (especially positive) is the number one building block to help other writers feel more comfortable and more self assured of their work. It brings hope and inspiration to those who are struggling with their inner poetic peace and their state of mind. It moves the writer to become better than they were when they first joined the deep. Sometimes a positive comment can mean all the difference between a "Masterpiece writer" and a "I think I will leave the deep because I feel ignored and unwanted" kind of mind set. If you have faith and complete passion in what you write than you know there will be someone out there who will have the same passion and desire to comment proudly and positively on the piece the author wrote.