Hey,
So as someone who browses the site a lot, one thing that has always bothered me is the amount of tabs I end up having to open to check on all the stories I read and look for new ones. What's more each board isn't incredibly active, and many are very quiet.
So here's my suggestion.
Drop the individual boards for [m/m], [f/m], etc and merge them into their parent boards - it makes no sense to have them as most people just post in the parent board. What's more, add it as a requirement for all new topics to have a tag, it doesn't have to follow a specific nazi style rule set but it just needs to adequately convey the gist of the story (eg [M/M], [mixed], etc).
The only possible issue I can see is that it might be a pain to add [x/y] to all the stories from the pairing sub groups as they're merged (I'm sure there would be a way to create a macro to do it if there isn't already one).
As a result:
We have less boards + clearer labeling of each post = Easier reading -> Happier readers.