Chrono Trigger is my least favourite RPG game from Square... not to say that it isn't awesome, but I liked it less than say Secret Of Mana and it's sequal. The best RPG ever on a console I think is Final Fantasy 7. The depth and width of the entire game is insane, the music is ace, the plot is incredibly involving and has so many strands, elements and twists all the way up to the very end it's hard to keep up, and it's all excecuted perfectly. I love it to bits.
Repeat the last two sentances for Planescape: Torment too. That game is as brilliant, and slightly more adult.