Ok, the effects of being stoned and playing games is the OPPOSITE of what you said. Your mind doesn't wander, your senses highten and you become very aware and focused. I find that I play best when I'm high. Of course like that one guy said, it really depends on how high. But unless I've smoked 3+ bowls of hydro, I'm fine. If I'm drunk, I'm just happy if I can stay seated and not fall over.
I play games about 1-3 hours a day. But as with other guy(sorry I didn't look at the names), I can't friggin' wait till GTA Vice City! Badass. As for now I'm playing mostly NOFL2, UT2003, and NHL 2003 if I could get that piece of ass to work.