That moment where every Japanese based fandom I've ever been in comes flooding back thanks to Colors.
For starters there's Di Gi Charat, Kaleido Star and Reborn, my "big three"
My small, small stint in Gundam Wing fandom when I was, like, 13 because I thought Quatre looked like Nick Carter (NOT EVEN LYING.)
(I kinda had a crush on Trunks from DBZ for the same reason.)
And then there's ParaKiss, and Hot Gimmick, and Kiminozo and (also, why doesn't Colors have ParaKiss or Kiminozo decks 
)
)
I will have to fix that, lol.