Fiasco is a great pick-up-and-play tabletop RPG that is easily accessible to everyone from casual boardgamers to hardcore tabletop RPGers.
While the simplicity is good, the real draw is the emergent storytelling. No matter how often you and your four friends play The Quest for the Golden Panda, so long as just one of your relationships with another character is different (there's 36 possible TYPES of relationships, not even counting how you choose to define them), the game will play out in an extremely different way. And that doesn't even look at the other 4 relationships on the board, the 36 different types, each, of Needs, Objects, and Locations which drive the game.
Though it may be a standard of emergent storytelling, the replayability is near infinite on each and every module, which is another plus.
[5 of 5 Stars!]