As Radiator says a good rule of thumb is a game that takes no more than an hour to play....if it takes 30 mins to set it's likely a non starter (unless set up before hand). Cards Against Humanity while good suffers from one big flaw, people bore easily. While it might be good for the company to trot out more and more expansions, i usually find that people say "fuck i am not asking that again" or just changing their hand because they are tired of waiting for the right time to play cards.