comments on steemit is different from other platforms like youtube and facebook, because comments in this steemit is considered as a post similar to the post on the blog itself, then should the quality of a comment should be as good as posting on our own blog steemit, so read other people's posts before making good comments, so we know what to comment on, not just spam comments that we can post
Exactly mate, like you said it differs greatly. On steemit you are expected to make an impression with your comment, some would say pour your heart on it. Comments can be as rewarding as the post too and not just about the reward you leave an impression for the author and others who would come across your comment. Greatly helps. The two words comments don't do well at all