I'm not sure how so many people miss this since I feel like it's said all over the place, but nicotine is relatively non-addictive by itself. Without the MAOI components in tobacco to help change the way the brain reacts to nicotine, it seems to be about as addictive as caffeine, or even less for some people.
I agree. I've found I can vape 0mg juice without much discomfort. I have no desire to eliminate nicotine so I don't, but I could pretty easily if I had to.
Big tobacco has spent huge amounts of money for many years figuring out how to make cigs as addictive as possible. I honestly believe they use secret formula and special secret additives to purposely make them as addictive as they are. Vaping is not nearly as addictive. When I was a smoker, I'd be looking for a way to sneak in a smoke every half hour or so. With vaping, I sometimes go hours before I realize I have not vaped for a while.
I've had issue with juices high in PG. It can be an irritant for me. Also, I vape
a lot, about 8ml a day. Some time ago, I switched to a mix higher in VG content and I have much less issue.
One thing you have to keep in mind when talking about vaping side effects is that the cigs we were smoking contain thousands of harmful chemicals almost a hundred of which are carcinogens. Vaping involves only a few, none of which are carcinogens and everything but the nicotine is classified as generally safe. So, for any of us that were willing to accept the risk of smoking, we should have no problem with the risk of vaping. Just looking at the chemicals involved, it's orders of magnitude safer.
For new vapors, getting the nicotine level right is the biggest hurdle. I know I got too much more than I didn't get enough when I first started. You can get some strange side effects from getting too much nic, some of which the OP was complaining about. However, some people do have a sensitivity to the PG or VG in the juice. Usually, it's the PG people have problems with, but that's an easy fix, use a high VG or even an all VG e-liquid.