Before many of the members here came aboard, RpG's roleplays used to be split up by genre (you had the Fantasy, Modern, SciFi, and Arena forums). Now, they're split up according to the 'level of difficulty' that each roleplay consists of. So as far as making an Anime or Manga roleplay, just post it wherever it best fits (Beginners, Casual, or Advanced).

If its total discussion that you want, then the OTD (Off-Topic Discussions) forum is the place for it. I encourage more conversations like that in the OTD because frankly it's quite cluttered with a bunch of nonsense and spam threads. The more interesting threads we have in there, the less spam threads we'll get. Although I approve of your idea to create a new forum, something like that requires a good discussion and eventually a vote from the mods. Also, Mahz has the final say on whether or not a forum should be created, since, after all, he's the admin.

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