This is definately my favorite RPG on the GameCube. Good story, interesting characters (Kratos is my favorite and Sheena is second place), fun combat system, WONDERFUL soundtrack (my fave is the BGM in Meltokio castle), as well as the skits that help flesh out the characters. The only complaints I have are the varying difficulty in certain parts and some annoying puzzles.
Well discuss. ^^
EDIT:
Wait: I forgot about Raine-chan! So then it's Raine, Kratos, then Sheena.