I would love to be able to subscribe to whole forums such as Help & Questions or Suggestions & Ideas, like we can do for individual threads.

When a new topic is posted we would get an alert like we do when a thread has a new post. I'm not suggesting getting a ping every time a thread is replied to, just when new threads are added. Also for forums with sub-forums (Under suggestions & ideas for example there are Brainstorming, Avatars, Items, Pets, Achievements, and Cash Shop) I think we should be able to either follow the whole forum (Suggestions & Ideas) or just subforums (Brainstorming, Avatars, Items, Pets, Achievements, and Cash Shop).

Obviously this would be an opt-in feature. Personally I think this would benefit the Subeta Commerce and the Art Corner sections in particular, although I can see reasons why people would subscribe to any of the forums.