When I was still a teenager, I could play for more than 15 hours in a day and still can't be satisfied with playing. Sometimes, I do wake up at night to play small before going back to bed again or once I stop feeling sleepy in the night, I would get to my game and play till the day breaks.
But now, my gaming hours have waned because of age, commitment and responsibility to take care of. So therefore, there are more serious important things to attend to than to dish in several hours into playing games that wouldn't put a penny into my pocket.