[General Discussion] Difficulty in games

I, personally, love a good challenge. If a video game is difficult to finish, I will try as hard as I can to complete the game in order to get a sense of satisfaction. However, there is a limit as to how much I'll play a game. If a game takes up too much of my spare time (to the point near obsession) or the game begins to downright infuriate me, I'll put it down knowing that the game just isn't fun to play anymore.

How difficult does a game need to be before you can put it down? How easy? How important is difficulty to a game overall? Do you enjoy the challenges that video games bring, or do you mostly play for the storyline, fun, etc?

Jam it back in, in the dark.