Pretty much echoing Faye here.
Balmung's gonna have your largest RP population, as most RPers either started there or moved over to it.
Gilgamesh was also designated the other unnoficial RP server back when A Realm Reborn launched, but I don't know much of their server.
Jenova and Siren have also been working on building small communities as well. You can find a few Linkshells over in the Linkshell Hall, where were try to keep track.
http://sirenrp.enjin.com/
Jenova RP
Balmung's gonna have your largest RP population, as most RPers either started there or moved over to it.
Gilgamesh was also designated the other unnoficial RP server back when A Realm Reborn launched, but I don't know much of their server.
Jenova and Siren have also been working on building small communities as well. You can find a few Linkshells over in the Linkshell Hall, where were try to keep track.
http://sirenrp.enjin.com/
Jenova RP