Yeah, everyone's different. Cannabis is by far the most addictive substance for me and I have dabbled in "harder" drugs like Mdma, oxycodone and cocaine fairly extensively. I don't even feel like I have an addictive personality with anything else I use; I don't even drink coffee and it's real easy for me to turn down drinks.
This being said, marijuana has had a worse effect on my life than any other drug in existence. It made me delusional and I felt like I needed it and it was doing me good, however I would be smoking an ounce of the stuff a week. It also makes me just plain useless socially, normally I'm a social guy I always have smart things to say, but as a stoner I just wouldn't ever have anything to say, I was so boring and lame. It has a negative impact on my mental capacity moreso than anything else I use apart from alcohol (which is the only drug I consider worse for myself), even back nearly a decade ago when I was just smoking in moderation and was hardly aware that dopers like me even existed, who smoke weed first thing in the morning until just before bed, and don't even see themselves as drug addicts. It affects my working memory, concentration, sleep patterns (I never dream), social skills, motivation etc etc etc
So when I first started smoking, for the first 3 or 4 years, it was never anything like this at all. It still dumbed me down and didn't do anything good for me apart from having a stupid laugh with friends. I was smoking more and more though and before I knew it, I was smoking it from morning til night day in day out, dealing with mental health issues induced by the drug, and feeling like burnt out trash all the time - even though I was exercising hardcore daily, eating really healthy food (mainly veggies and lean meat), and getting through a very tough college program (exercising my brainpower daily for hours). So I justified my use through these more positive aspects of my behaviour, even though I was pretty much a junkie and it was ruining my social life, and making me feel like my life was totally meaningless.
It's very sneaky and the addiction will creep up on you, and once you're on it, it's really hard to stop as I pretty much want to kill myself for a couple days when I'm "withdrawing" and I become aware of how it has wrecked my life. It induces all sorts of horrible mental problems in my life, and I am completely, 100% sane when I'm sober. I can't believe how depressed I have been because of this addiction. I have also been unable to eat without puking, and had horrible insomnia directly attributed to this drug withdrawal at various points of my life. So I always end up getting high so I can eat breakfast, getting high so I can fall asleep, getting high so I have a wide grin on my face instead of an angry frown... I cannot believe something exists that makes me so stupid, yet that I obsess over and am completely attached to. It makes no sense, until I realize that I'm just brainwashed to give criminals money.
The best way to avoid addiction is to stick to drugs like mushrooms that arn't addictive. Few smokers wish to smoke weed all day every day in the beginning - it just happens somehow. Mushrooms do everything good pot does for me and more without the addiction, horrible comedown, and side effects I get from pot. Everyone's different but it's my opinion that a lot of stoners are misguided and unaware of the negative aspects of this drug, or that it is even a drug for them anymore, as they smoke it so much that they hardly even get high. It is my humble opinion that cannabis use fucks people up a hell of a lot more frequently than psychedelics as it's way easier to abuse. Many people just need it to keep themselves from freaking out, and in order to be able to eat and sleep properly. I've seen multiple cases of this, it really isn't all that rare, and people do not realize that they could be doing a hell of a lot better in life if they didn't smoke that stuff all day every day.
After all the shit this drug has caused in my life, I would recommend sticking to psychedelics and avoiding this addictive weed because the risk of habitual use is quite high. The only reason I'm off it now is because I am living somewhere remote where they is little to no possibility of getting high, and plus I am just fed up of this nasty, no-good drug habit that gets me nowhere.