Expanding on that a little (hey you got me thinking about it!!!)

I think it also depends on the "emotion" behind the post. If I'm posting that I'm feeling relief from depression because something good happened it would go in the depression forum. If something good or funny happened that I wanted people to know about I'd post in general.

So I guess that I think "what is the point of my post... to let people know how I'm feeling or to tell them about an event in my life"