Not-a-mod, but one example of a non-rare chromatic fandom would be Prince of Tennis. While I love that fandom, I'm really not sure truly rare fandoms should be competing with it for attention. I could read five fics a day for several years and still not see the bottom of the PoT pile.

If you're interested in checking out some awesome and very much not rare animanga/dramas, let me know! I'm always happy to pass on the addiction love. ^_^