ERP is there, most definately, but the RPers are a MASSIVE community.

Also, for some reason, any FFXIV fan who uses tumblr is pointed towards Balmung. I know a great many players who are Balmungers that have nothing to do with RP, but use a tumblr blog for their GC site or just to post goofy stuff they do. The FFXIV tag is always filling up, so, that's another relatively large community of players all hopping into Balmung.