I was literally obsessed with Star Ocean - The Second Story about 5 years ago, I spent several summer nights in a row and finished the game from start to finish every time - and I even managed to get 8 characters each night! :eek:
My motive was pretty lame, I just wanted to unmark how many endings I had seen, but that was a good enough excuse to restart the game over and over. :monster:
I felt that time passed incredibly quickly during those playthroughs, I could be like "hm, it's probably 3 AM or something-but-whoops it's 7 AM". :p
By the way, I personally think it's a pretty pleasant feeling to become completely absorbed into a game and just sit back and enjoy the moment - it's almost a bit like becoming absorbed into a book.