Obviously, I check new activity in all forums for spam, but I only ever find anything useful to say in GD and TT&T (or as it's popularly called from now on, "titties").
When OT was alive, most of action was there, and GD was empty. Other forums were pretty much as active as now. There are some that really should go down the drain:
*Message board requests - if CG isn't giving away new forums, is there a reason for this section? Since it's a spam magnet, it could at least be temporarily locked until/if they start giving forums again.
*Cartoonist's choice awards - I don't think they are giving this award anymore, or am I mistaken? If they aren't, what's the point again?
*Community get-togethers - It used to have a point but nowadays whoever is planning something, is gonna repost it to GD anyway, otherwise noone'll see their post.
*Dropdowns and crossovers - this forum was never really any useful to begin with.
*Keenime, Forum Games - It's not like these forums couldn't be active, it's just that they haven't been for a very, very long time. They were made back when activity here was so huge that it made sense to separate some content into different section. Nowadays, even if you want to dedicate a thread to "Say something about the next poster", noone will complain about it being in GD
So that leaves GD and titties, Help is of course kinda the whole point of the forum, and Pitching gets some activity from time to time. You can as well browse through Archives too, if you want to read some funny stuff.
I wonder, though, if there's any significant activity in any of the individual comic forums.