For me, because I have really bad anxiety and can be rather shy, I just appreciate that someone responds to the post. It can be a show of support or encouragement, an example of their relating to my problem, or even just a smiley.
I believe the majority of people on this site are here because they are either lacking a support system at home, or they need to connect with others who share the same problems and concerns.
It all comes down to kindness, understanding, compassion, and many times connection.
Last, I think some people are better at expressing themselves and responding than others, so I always try to find the good in whatever anyone says....whether it be the poster or the responder.