I agree, even if my vote power is negligible (as usual) I try to leave a comment on a post that I enjoyed. You have point. It nice to see a trail of comments back and forth on a post. There are so many curation trails now that just give the vote but no one reads the post. I think that is sad as well.
Thanks @blueeyes8960. And you are right. I myself follow some curation trails but I still keep on with comments.