I leave a comment when I like a article on a site or I have something to valuable to contribute to the discussion. It is caused by the sincerness communicated in the post I looked at.
And on this article Gästebuch. I was actually excited enough to create a comment :) I do have a few questions for you if it's allright. Could it be simply me or do some of these comments look like they are written by brain dead individuals? :-P And, if you are posting at other sites, I would like to keep up with everything fresh you have to post.
Could you make a list every one of all your communal sites like your Facebook page, twitter feed, or linkedin profile?