I guess for me I'd go with:

- Out of the list of Anime to RP, I have only seen Bleach so that'd be one I wouldn't mind taking part in.

- Out of posting speed, in my opinion, to keep the momentum going I'd say I prefer 1; Fast, a post every 6 hours.

- Post length I'm Okay with 2, a one-liner here or there isn't too bad since it could help with the fast responses, as long as it isn't too often like the free section RPs.