Please keep this answer voted below the other one, so the other one is more visible.
I would like to set some targets for which tags we should try to have in the system by the time the season ends (at the end of December). Getting all of the currently unasked-about series in the system obviously isn't going to happen, since a lot of those series are e.g. family-oriented shows that nobody outside Japan watches.
Instead, I propose that we should try to focus on shows that are likely to have a reasonably-sized English-speaking viewer base. In my estimation, that means the following shows (that don't already have tags; bold for particularly "important" ones):
- Concrete Revolutio
- Dance with Devils
Gakusen Toshi Asterisk
Hacka Doll (a short, but by Trigger)
Heavy Object (going to be super-popular because Kamachi)
- Hidan no Aria (this somehow got a sequel, so clearly somebody is still into the KugiRie-as-tsundere genre)
Rakudai Kishi no Eiyuutan
- Shinmai Maou no Testament
- Shomin Sample
Subete ga F ni Naru (lots of hype here)
- Taimadou Gakuen 35 etc
I will probably watch most of these and ask questions about them as I have them. If you're watching any of these shows, you might like to try to do the same.
In summary: by the end of the fall 2015 season (plus a few days), we managed to get questions about 7/13 of the shows listed above. Not bad, though I have to think we could've done better. (I, personally, also watched Dance with Devils, but was unable to muster any interesting questions about it.)
Oh, well. On to winter 2016!