My gaming habits have changed because I don't have a parent telling me to shut the system off and go to bed. Most games are not that long or involving that I feel the need to stay up late playing them any more. It those unfortunate games like Fallout that keep me playing a bit too late at night on a weekday. Most of the time I look at the time and go "Its getting pretty late. I will just finish this level and call it a night".
I have been gaming since I can remember. My parents old Atari and Commodore 64...and I don't even really remember the Atari other than it existed XP