As a sporadic visitor and sometime poster to Community Board, I will play.
Limiting this to CB posters as opposed to other boards here at the DIS and choosing to name someone not previously named, I pick:
Pinwizard - She seems like a real nice person to me and not only did she start the Wedding Picture Thread (which I loved) back in 2002 or so, but she commented on every single picture posted on the thread making the overall feeling as one read it and enjoyed the photos even more joyous and warm and fuzzy.