Jumping subjects, there are some games with very detailed drug rules. Shadowrun, for example, has lots and lots of awesome drugs. Character creation encourages players to be addicated to one drug or another (you get more build points!) and drugs have awesome effects.
For example, my magician character takes Cram. When using he gets a second Initative Pass, letting him act twice as often as he normally would. And when he's not activally using he brushes his teeth with a wire brush to try and get at the bugs that live between them.
New World of Darkness has lots of drugs but they mostly focus on the negative elements. What kind of fun is that? Though if you use weed you get a +2 on Composure checks, which is nice. So advise to people playing into Ross games: toke up.