Nicotine withrawl made me high. I don't think it's the horror show that pharmaceutical companies make it out to be with the invention of the patch, nicorette, and whatever else they've come up with. Having smoked almost 3 packs a day for well over a decade my withdrawl was a sore throat, cold, and a wizzy high like feeling, that I actually enjoyed.
And while nicotine has been proven to be addictive, I don't believe it's nicotine addiction that keeps people smoking. If anything that might be like 1% of the addiction. The rest comes from the fact that for me it was something I did every 10-15 minutes for years on end. And I liked it. That's a pretty frikken powerful habit to just be done with. If it were mostly the nicotine that had me addicted, I'd have been much more successful when I chewed nicotine gum. Or if I had just put on a patch.
Just my opinion and experience. I have nothing scientific to back any of that.