I grew up smoking weed, and at some point in my life, I stopped completely. I, personally, suffered from the paranoid and laziness traits that effect certain users. It was a few years later that I tried cocaine.
Now, I always err on the side of safety, so when dealing with a drug that can kill with overuse, I tread carefully. I do way less than the normal user, and I do it only once a week. When I do do it, it's great. I get a LOT of work done. It's like coffee x2.
I don't want to argue with anybody about the substance, but I believe, for me, its positives outweigh its negatives. I hope one day the quality available to the public increases, and one day, that it is decriminalized.
Something like MC-18 will probably help extreme cases of addiction, but, it sounds like a very intense drug.