I drop a comment when I like a post on a site or if I have something to contribute to the discussion. Usually it's triggered by the sincerness displayed in the article I looked at.
And after this post gbadd | gastebuch. I was actually excited enough to drop a thought

I actually do have 2 questions for you if it's allright. Is it simply me or does it look like like a few of the comments appear as if they are left by brain dead folks? :-P And, if you are writing on other online social sites, I would like to follow you.
Could you list the complete urls of your community pages like your twitter feed, Facebook page or linkedin profile?