I comment when I like a post on a website or if I have something to valuable to contribute to the discussion. Usually it's caused by the passion communicated in the article I read.
And after this post Guestbook. I was actually moved enough to post a thought :-P I actually do have some questions for you if it's allright. Is it just me or does it look like a few of the remarks come across like they are coming from brain dead people? :-P And, if you are posting on additional online sites, I would like to keep up with you.
Would you make a list all of your communal pages like your linkedin profile, Facebook page or twitter feed?