Every comment adds value to your blog. Comments that strike a conversation are awesome but if people just say that they liked the post (in a sentence or more) I am ok with it. But if they just say 'good post' I mark that as spam.
Everybody wants more blog comments, but what's the point of having 100 comments that just say "good post" or repeat what you said in the post?
The purpose of blog comments is conversation. You want readers to get to talking about the concepts you've just tried to teach them. You want them to ask questions, share stories, and give YOU more ideas for future content.
So what do you think? When you comment do you add value to that blog? Do you get valuable comments? Do you use those comments in new posts?
I only comment if I have a point to get across / want to argue / ask a question.
Or else I never comment.
I'm alright with people conveying their gratitude of a post, but I'd like to see that done with more than two words, like you said.
Post comments makes your blog vivid. And the way I see it, if someone doesn't have to say that much and only says: 'I agree with you and I like this post' there is one comment. This makes the treshold for other readers to comment lower as they can see it is possible to comment!
The power of the Title. I haven't put much thought into this yet, but yesterday while reading my Google alerts I came across a realization.
Many of the posts that I comment on I do so almost solely based on the title. Example: Let's say you are a huge Oprah fan. If you came across a post that was titled "Oprah is Nothing More Than a Big Wind Bag" wouldn't you already feel compelled to comment saying she is not?