My personal favorite is the ".hack//" franchise of games, when it comes to PS2 RPGs. The fourth entry: ".hack//Quarantine" being my personal favorite.
Kingdom hearts of course XD
Shiro, NO, TALES OF THE ABYSS!!! fuck yeah!!!
I would have loved .hack// had it not been so repetitive. I mean, I still cosplay Elk, but.. mmmmmeeeehhh. (I need a Mia, also :( )
My choice goes to Ar Tonelico 2
Ed, you're amazing. One of my top games for sure.
Final fantasy 10 is the only one that really comes to mind at the moment though there was a lot of games I enjoyed the ending to this game made me ball my eyes out like a newborn infant. Really like the scenes, characters, and story. It is probably my favorite one since I stopped playing the FF series shortly after that one.
Star Ocean: Till the End of Time
I second Star Ocean. The Dock Hack series is my second.
Kinda surprised being a JP-oriented forum, nobody has heard of Ar Tonelico. One of the best JRPGs that I've stumbled upon in a long time.