for me heroin was much much harder to even contemplate stopping than alcohol or any other drugs.....seemed like i could go weeks on end drinking my face off every night and then one day just decide to stop and that was that. No urges to go get drunk or any of that, and suddenly I would realize it was months since I last had a drink
Now heroin on the other hand.....even if i only got that dizzy warm head and heart rush feeling ONCE, i would fight for days about wanting to feel it again and go out and use again. Not only is the mental addiction high for heroin but it only takes somewhere between 3-5 days of daily use to start to feel mild withdrawal symptoms from heroin, alcohol takes waaaaay longer.
I used to never agree with our society for banning certain drugs but now after having lived through being a heroin addict I can see why some drugs are strictly outlawed from all use simply because they really are that detrimental.