Depending on the game i can play anywhere between 4 hours to 20 mins. I got lost in Zelda Game series and Final Fantasy, even the Halo Franchise, but other games like Flight simulators, theme park world, e.t.c bore me fast. I try to play games through to the end of the credits though

One time, I knew if I did the boss fight on a game that I would never play it again, so I resolved not to fight the boss until it was 100% complete. I haven't touched it since Guess that didn't really work.