Heroin and crack are nothing compared to meth in terms of addiction. Well, heroin might be, but it is a much slower process. Heroin is an evil drug but I don't crave it after using it about a dozen times. Meth I used about a dozen times and I still get the occasional craving for it, similar to a cigarette craving but stronger. But only for a few minutes, and very rarely. But this is seven years after using the shit last and I only smoked it a dozen times. It is super super super addictive. I suggest avoiding it. Amphetamine is much less addictive. On the other hand, if I kept using heroin for a month or two I would probably be in the same boat. Heroin is a more sneaky addicition. I think it is easier to get addicted to meth than to heroin, but in both cases you are fucked if you get addicted imo. It is really hard for me to pick which is worse, they are both bad in different ways, but in pure addictiveness meth wins imo. Crack is over rated, I don't see how anyone can enjoy rushing so intensely. Tried it once and never plan to again. I very well may try meth or heroin again, but I have a limit for 4 more times with heroin that I set before I used it the first time. Meth if I use it again I will need to set a limit, but I really probably wont use it again just because why make myself get cravings for it even more its been seven fucking years after 12 uses and I still get cravings every now and then.