I have always been a fan of gamebooks and then rpgs.
For me the most important things is to see the consequences of my actions in-game and allow mistakes to happen and not necessarly lead to a gameover.
Also to let the player to choose how he wants to play his story.
Fight Club is the story of a female figther making a living in a Dark Near Future - 2024
The game is mostly text based，playable in a web browser (firefox recommended) and you make choices that affect you and those around.
A choice can have little effect or it can have a long term and rippling effects.
Just like in real live you are not aware of what are the full consequences of your actions，but they should be mostly consistent with the game world.
The amount of choices available makes it so it will be hard for 2 players to have the same experience.