From most recomendable to least
Persona 3 FES (PLAY-THIS-GAME!)
Suikoden V (One of the best stories ever)
Star Ocean Till The End of Time (HUGE)
Xenosaga Ep 3
Xenosaga Ep 1
Suikoden III
Shin Megami Tensei Nocturne
Xenosaga Ep 2
Rogue Galaxy
Tales of Legendia
SMT: Digital Devil Saga
Suikoden IV
These are the ones that I recommend. The ones I do NOT recommend are
Kingdom Hearts
Shadow Hearts
Dragon Quest VIII (I HATE this game)