I’ve not played all of them, but from what I’ve heard, here’s my top 3:
Garnet’s singing in FF9. I’ve always loved songs with soothing melodic vocals
1000 Words (FFX-2). I don’t know why I really like this, besides the fact that the girl’s vocals are really good, and the lyrics are pretty decent.
Real Emotion (FFX-2). What can I say, the song is just sweet :D. It sounds weird listening to it in American & Japanese at the same time. The intro video of the game for this also rocks by the way ( ).
FFX-2 Yuna’s Ballad, (just because I’ve memorized it on the piano)
but for RPG songs I would have to go with Radical Dreamers- Unstolen Jewel (ending music from Chrono Cross) (I also have that memorized but it is an excellent song w/ lyrics (no i dont’ sing))
Here’s more I like:
Yuna’s Theme from X-2
Emiko Shiratori - Melodies Of Life (IX)
Jesters of the Moon (IX)
Vivi’s Theme (IX)
The Place I’ll Return To Someday (IX) (Town [well, most of them atleast] music)