Persona is centered around summoning "personas" in order to do battle for you (in the games turn based battles). These personas can be altered and combined, giving access to more personas to use in the game. Just this aspect alone can provide 100s of hours of gameplay. Then there is the
In game tutorials and introducing the player to all the gameplay mechanics can take up to two hours. This is a large amount of time invested to finally start freely playing the game without any limits, which may not appeal to everyone.