With less overall free time these days, I usually go overboard when I find the time to game, which is mostly on weekends. So I could go for 3-5 hours, maybe (hopefully!) more too.
It's true what they say, when you're a kid you have so much time but so little money to buy games, but it's the opposite when you're older (just turned 30! fuck me). Back then I'd put in like at least the same amount probably EVERY SINGLE DAY. I still remember when seeing the sun come up was the signal that it's time to sleep. And back then I could function with like 3 hours of sleep no problem. Fuck getting old, man.