I also recently added Mata saitama 2000 and Hataraku 2000. I'm not sure if I should add Tenjiku 2000, Joubutsu 2000, Taberuna 2000, Don't eat 2000, or Su-ha 2000. I don't want to add shimedore 2000 though. I'm a huge fan of the 2000 song series.
I'm just wandering for those who are Taiko no tatsujin fans and want certain songs? Right now the Taiko no tatsujin songs I have are Saitama 2000, Koibumi 2000, Kita Saitama 2000, and EkiBEN 2000. So.... any requests from the 2000 series?