I have the first few suggestions to make in this thread.
Firstly, how about a Shippers Community? It might make some good discussions, and also you can meet new friends who have similar interests as you!
I agree with this, if the number of shippers in the forum is sufficient.
Secondly, a Clubs section, where people who have the same interests (other than shipping) may meet in groups dedicated to a subject, for example a Dawn/Hikari Fan Club, an Eeveelution Lovers Club, and a Christian/Muslim/Atheist Club. Just not anything dedicated to one Pokémon only, or to any minor characters.
I think that the groups system is rather similar.
Thirdly, I'm not sure if this is necessary, but a Debate Forum might be good for some more serious Miscellaneous threads, where keen members can argue about their opinions and have a good, serious debate. Like debating on whether a new law should be enforced or whether the Government should actually do something about the homeless.
If I'm not mistaken, this has been brought up a few times in the old Suggestion thread. Good idea. Dump Dex's rant there while you're at it.
If any of these forums exist already, I apologise, since I haven't been on here like forever...