I'll throw my hat in for the PS2, actually:

Final Fantasy X, X-2, XII (three of the 5 best in the series)
Star Ocean 3 (best in the series)
Kingdom Hearts 1 & 2
Xenosaga Episodes I-III
Dragon Quest VIII
Rogue Galaxy (severely underrated game)

plus ones I haven't even played:
Persona 3 & 4
Tales of Destiny/Symphonia/Rebirth
Suikoden V
a bunch of .hacks
etc.