Alright, let's say you were in charge of coming up with some ideas for the next numbered FF game and were told to compile a list of essential elements from the series. You are only allowed ONE ELEMENT FROM EACH GAME but you are not required to take one from every game if you don't want to or can't. You can say characters or stories but you must explain your answer and it can't be simply because "I like them". So what do you feel are the essential elements that each FF gives?