I have to admit as i get older, there's been a steady decline in my interest & # of hours of playing video games. I don't know when i can say i'll totally quit playing video games in consoles, as I am after all a console gamer. But the safest i can assume is that when i probably become a grandpa already, lol.
I'm 33 and my interest is already declining. Beside I barely have time to game at all these days with a family, a daughter and mortage to look after. However if I do get time to game usually I'd do it around 9-10 pm for about an hour or two. But its been a good run. Started out with the Atari 2600, C64 and Amiga 500 before moving on to consoles.
In theory there is no differens between theory and practice - but in practice, there is.
Gotta say, it does suck not having enough time to play like I used to.
I was between jobs here a while back and with not much to do all day besides play games, I did find myself not wanting to, but now that I'm back to work I very much enjoy playing them in my spare time now.