I leave a comment whenever I especially enjoy a article on a website or if I have something to contribute to the conversation. Usually it is triggered by the sincerness communicated in the post I browsed.
And on this post GM Werkzeugmaschinen. I was moved enough to post a thought

I do have some questions for you if you tend not to mind. Is it just me or does it seem like a few of these responses look like they are left by brain dead people? :-P And, if you are posting on additional online sites, I would like to follow you.
Would you make a list all of all your social pages like your twitter feed, Facebook page or linkedin profile?