I used to do a lot of blog commenting when I first started blogging, now not so much. Mostly because, I started focusing more on other strategies, but after reading this post, I am thinking of getting back to commenting on other blogs.
But, secondly, your story shows the amazing power of quality comments. In your case, it turned someone who by all rights should have been marked as a spammer in a consistent, devoted, loyal reader of yours. That’s awesome.