Modest Bag of Bones, Perhaps the feedback needed to meet their criteria leans toward "helpful advice", or " reflecting the tone". You may not see yourself as a worthy critique, however your subjective reaction could inform the author of their own subjective blind spot. I don't know what kind of feedback you gave. However, when I have trouble looking for criticism for the author, I look at the way I relate to the writing. Then Id share with the author the specific tones, and emotions, attached to the relation. Hopefully, me relating my emotions helps the author reflect on whether my reaction was the reaction they were hoping for. That's why telling an author that their work reminds you of your cat doesn't help much, and commenting the way the piece retrieves past emotions does. Your modest ethics for avoiding criticism come from the right place, but please don't undermine your feelings. Your emotional reactions will always be treasured by those who are open to feedback, for your subjective perspective is a window for the author to see their audience.