I leave a response when I like a post on a website or I have something to add to the discussion. It's triggered by the sincerness displayed in the article I looked at.
And after this post Gästebuch. I was actually excited enough to drop a commenta response

I do have 2 questions for you if it's okay. Is it only me or do some of the responses come across like written by brain dead people? :-P And, if you are posting at additional online social sites, I would like to follow everything fresh you have to post.
Could you make a list every one of your shared sites like your twitter feed, Facebook page or linkedin profile?