ilove personal possession, cultivation, and consumption of recreational weed has been legal here (Cal) since Prop 64 passed in 11/2016. You could grow it, smoke it, and give it away, but you couldn't sell it. What's happening 1/1/18 is the legal commercial sale of weed (i.e. pot shops).
The rules are pretty much the same as for alcohol. Age 21, can't smoke in public, no DUI, no being (obnoxiously) stoned in public.
I have no problem with our new laws. It's regulated and the THC content will be clearly marked (as it currently is for medical weed). And I haven't seen a great increase of obviously stoned individuals making a nuisance of themselves or causing fights in town of a Saturday night over the last year.
People can and do become addicted to weed (psychologically). But people can and do become physically addicted to alcohol. And a good deal of the money made from legal weed will be going to research, education, and treatment for substance abuse disorders and mental health programs. And there will be a decrease in law enforcement costs that can be funneled to other uses, such as domestic violence and anti-gang programs.
Win/win as far as I'm concerned.