Hi Jenna - well thought out question.
I have to say, I hardly venture into half the categories as it is, let alone the sub-cat's, as I just don't have the time.
ChatterBank started off okay, but soon descended into chaos & took a lot of the, then, Ed's time up monitoring it, so it was best it went!
Having said that, it's a shame B&S seems to have taken its place, changing it from the more interesting category it once was.
Really not wanting to blow my own trumpet (as one or two would love to put it), but I recently suggested a General Greetings topic to cover Birthdays, etc., which has been granted, for now anyway, but named Seasonal. I thought perhaps, it would keep all the Greetings, etc., together under one roof, rather than in Suggestions & B&S.
Hope that helps - back to knitting!