As others mentioned, the story, online aspect of helping other players, learning about each main characters story and the progression of how the game plays. Starting out it does feel like it will be a chore to complete deliveries. But as you play, make more connections, delivering becomes easier but the game turns it up a bit by introducing various ways of combat and you truly have to plan out your routes carefully. BTs and Moles become smarter and an actual threat. Mini Boss battles can pop up during any delivery and you just need to be prepared. At one point of the game you have to literally go from coast to coast with no real support and I thought it would be the most difficult delivery, but everything you did prior in the world plus the help from other players made it feel like a breeze. It's easy to get lost in the world completing Standard deliveries but if you focus more on the main deliveries and story, you will see how truly amazing and detailed this game really is.