I do see some good discussion threads every now and then and also try to initiate a few topics of interest at times but only a handful of people generally post responses.
I think the media section is active as people (also getdarians) may find it a convenient place for their albums
While I am not active in the personals section, the gender imbalance like mentioned above maybe a problem in getting adequate responses.
I do think if the forums are active with quality discussions and more people participate in forums, the site will attract a more balanced and more keen crowd which will help site traffic and also the personals section.