As far as everything getting better after stopping, that was a bit touch and go for me the first year, but that is in large part due to my various other addictions. But now, yes, every part of life is indeed better.
Having ventured into some of the more undesirable places of Chicago, I would have to say the smuggling and importing and general lawlessness of the drug trade is a problem. So where it is still illegal, it's unfortunate to see others choosing to break the law, just to get a temporary feeling. Like the Dr. said, they just wanna get high, but don't realize the weight of their actions.