I drop a comment each time I like a article on a website or I have something to valuable to contribute to the conversation. It's triggered by the sincerness displayed in the post I read.

And on this post Gästebuch. I was actually excited enough to drop a leave a responsea response :) I do have 2 questions for you if you do not mind. Could it be simply me or do some of the responses look as if they are left by brain dead visitors? :-P And, if you are posting at other places, I'd like to follow you.
Would you list all of all your community sites like your linkedin profile, Facebook page or twitter feed?