[JasonB]

Yes, but I'd say any forum is led by it's members.

I once read a post on our facebook group saying "I know you guys aren't interested in tracks, but ....." 

Well bloomin eck, we certainly are interested, but perhaps new tracks don't come along that often, and maybe that makes people think we're not interested, because they're outnumbered 100 to 1 by photos of new cars, or whatever.

But as you said, most forums try to cater for everybody, the hobby is too small not to do that. But every forum will have it's own character, perhaps regional focus, and areas of interest, created mostly by the members.

I don't think two forums feels the same, consequently you see a lot of the same regulars on a lot of them (like myself) and some regulars you only ever see on one forum.  I can only presume that's because each forum caters to different types of people.

 Mostly I agree except for the last point.
I dont think people choose a forum because they are a type. I think it is perhaps more to do with the spheres or genres of the hobby that are catered for in that hobby but....they nearly all cater for all spheres or genres!!!

My first thought was Slotblog which is predominantly 1/24 focused.