Interesting - I was about to make a new post - "Is This Your Favourite Forum?" - along the same lines.
I'm a member of a bunch of other forums, and have been on some of them for many years. I will drop in occasionally to check out something specific (like if I want to do something specific on Cubase I will go to the Cubase forum I'm on, or if I'm interested in buying yet another bass(!), or learn some element of bass technique I will have a look at the Basschat forum, but I tend to only be a light touch member on them. Probably did my intro post, full of enthusiasm, but then found them interesting to some level but not gripping (or sticky as the web marketeers like to say).
There are no doubt others I have joined and forgotten!
But I find that I am much more drawn to this forum - interesting people and songs, valuable feedback and thoughts, and I guess songwriting is a core passion for me. All the subtopic areas of interest, and I think the more you do post and read, the more you feel part of something, and so it becomes a virtuous circle.
The Cubase tool is just there to help me with the thing I am passionate about, which is the song and songwriting. So the Forum on that is less interesting to me. It's still a good forum with great people, but I don't really feel part of it.
Bass playing is also a passion, but for some reason I don't feel the need to hang out so much on the Basschat forum.
So maybe people have an interest in song writing, but not enough to stay around or post much, or don't want to receive feedback, or the topics just don't grip them initially.
But I think this is a good place to be!
and I think that is my 100th post and leads me to the next dizzying level of membership