Rise of the Argonauts is fine. I thought the voice work was pretty darn good. The music is great. The character models aren't meant to be realistic - there is an amount of style. Think of hercules as having an http://en.wikipedia.org/wiki/MSTN mutation.
I haven't finished the game or gotten too far, ran into a bug (I have the PC version), and I sort of dropped the ball on testing the work-arounds available.
God of War is awesome. It isn't TES, it isn't open-world, but that doesn't make it a bad game. In fact, it is an awesome game.
If you want a hack-n-slash RPG with mythology, try for Titan Quest.