I'll stop playing games when they are no longer interesting to me. Video games are a hobby, and like any other hobby (soccer, friends, etc) when it becomes too expensive or no longer worth my time then I'll stop. As of now, blowing the living hell out of anything that moves in the Killzones and Gears of Wars in the industry provides a good release to a long work day.
I'm "working class", the only difference between my gaming habits now as compared to when I was in college is the amount of time I invest in it. But gaming will never die for me until the industry just starts running out of ideas.
I'm 37 years old. Last year, I quit playing for three months. My reason? It stressed me out and I felt like I was outgrowing the hobby. I even went as far as selling my PS3, my games and accessories, and deleting my backup.
A few months later, I began to really miss it and I was having withdrawals. I ended up buying my stuff again. I enjoy my PlayStation 3 more now than ever, and I truly feel like I'll be playing for at least another fifteen or twenty years.
Current library: Dangerous Golf, Grand Theft Auto V, Madden 15, Mortal Kombat XL, Resogun, Super Stardust Ultra, Uncharted Collection, WWE 2K16
These days my ps3 and my 360 are rarely turned on. That's to be expected when you have two daughters and a wife. It's my hope that both systems will stay in good shape until my oldest can play games on either of them. I used to play Call of Duty Modern Warfare and Gran Turismo 5 but I cannot sit down for an hour anymore to play. Too busy with the family and work and I wouldn't trade that for the world.
I will quit playing video games when I am dead....unless they have video games in the afterlife.
They do in my faith, lol.
I've been playing games since the first time I saw a coin op cabinet back in the early 80s. I still remember the day my dad came home with the Atari 2600.
Where my dad used to give me a handful of quarters and send me off, all the while saying "remember, noone's ever going to pay you to play video games," today my kids and I play games together. We can play co op or competitively and it serves as an excuse for us to bond.
My kids' desire for more games, new systems and better TVs to play them on serves as a motivation for them to do well in school. First of all, they don't get to play games if they don't do their work, but there's more than just that. They know that by doing well in school and earning their degree, they will have put themselves in the best position to always be able to play new games and buy new systems and technologies when they come out.
As for when I'll stop...I'll stop playing games when I'm physically unable to.
What is a man? (Just look above)... "The ultimate measures of a man is not where he stands in moments of comfort but where he stands at times of challenge and controversy".