My favorite playstation game would be the 1st Parasite Eve. This game may be known to some but I feel that not a lot of people know how awesome this game is.
It's an RPG with some real time action going on where you can dodge enemy attacks and plan your next action; a perfect blend of both worlds
Along with it's killer game play it has an amazing and memberable soundtrack especially the intro theme. I feel that Parasite Eve is under appreciated and I still have the original PSX copy