Addictions to drugs should exist imo. Having an addiction to alcohol is an entirely different thing tbh. Even if you drink loads and loads of beer for a couple of years won't make you an addict, i've sure drank my share of beer and never really felt the need to drink beer in the morning or anything like that. Same goes for my friends, i'm pretty sure that developing alcoholism must have a lot more to do with your genes than having an addiction to drugs.
If addictions for the player will be in the game then it should be strictly to drugs. However i would like to see some alcoholic npcs. Being an alcoholic myself in Skyrim after drinking a hundred beers would just destroy immersion lol.
That's true, except it's the same for all drugs. Trust me heroin, coke, ecstasy are the sane way. In fact alcohol has been named the most addicting of all drugs by some scientist (I believe it's caffeine) yet you my fine sir, as well as I, are not addicted. Which means addiction has underlining conditions.
BTW, it's not genetic. It's more disposition (social-ecosystem, childhood, etc)