What do you think a blog comment is? Take a moment to really put a thought into that.
I’ve always thought a blog comment should be a continuation of the conversation from the blog post. Sometimes I write long drawn out comments cause I think of a lot to say. Sometimes I just leave a note about a related idea or a site I’ve found, some kind of quick information to pass along.
I don’t agree with rating, ranking or reviewing blog comments as if we are keeping score. A comment should be freely given and accepted graciously. (Not counting comment spam of course).
When did you last post a real comment? Add something useful, interesting or personal to the conversation in a blog. If you put some effort into it you will find yourself getting noticed. People will come to read what you have to say if you can show them you actually do have something to say.