I like JPP because of its loose moderation. It allows many people who have been banned from other forums due to their anger, bigotry, irrationality and mental instability. All of which is a major draw for me.
While it's also fun to have friendly discussions such as on "the nice thread", it's observing how people react to current events over time that interests me the most. Clearly some are flatout mentally ill. Several are simply suffering from dementia and consequential paranoia. Some are simply angry and venting their rage on strangers without recognizing those strangers as human beings. A few are rational, educated and emotionally mature.