Ok, this is not an attack, but I have seriously thought about this when I first started ecigarettes. I went to nicotine 101, and learned how nicotine works and affects our dopamine production. And it has controlled the way I vape.
Now, the dopamine increase the energy levels slightly... this is where everyone compares it to caffeine. It also give you a slight bit of energy and a feeling of satisfaction. However, most nicotine products have a more serious side effect than the dopamine stimullus itself. Usually injury and/or death is caused not by the nicotine affecting the dopamine, but the delivery method of the nicotine. With smoking, it's the tar and ash that kills people, not the nicotine itself. With Harder drugs that stimulate the dopamine pathways, it's the other chemicals that do the damage while the dopamine stimulus causes the addiction. Therefore, someone will smoke themselves to death or do harder drugs.
Most papers and studies done deal with smoking being the main cause of the nicotine delivery. For most studies, Nicotine = Smoking. Ecigarettes, which are new to the market, totally changes those reports. As an example, on the Nicotine 101, it takes serious accounts of nicotine addiction, and how it affects the brain. However, any negative results or comments on the whole subject are directed to smoking. Remember, it's not the nicotine that kills, it's the delivery method.
So, I ask the OP... why quit nicotine? Is there any side effect of nicotine that should be of concern besides the addictive process itself? The only side effect of nicotine I know of, is slightly increased heart rate. It is a natural chemical found in egg plants, potatoes, etc. Too much anything is deadly, and nicotine is no exception. But if you do it moderately, is there a reason to quit?