If you're asking do you NEED nicotine for flavor- NOOOOO. I personally smoked cigarettes for 10 years and completely quit when I started blowing (big) clouds**. If lack of flavor is the problem, you're likely not using the correct flavoring for e-juice.. Also, you may not be putting enough (my issue when I first started making my own).. There are calculators to help determine how much you need of which brands/flavors of juice and good guides if you want to read ^^ is a GREAT thread (Im pretty sure I've come across it before,) but if you are looking for nicotine, be sure to READ the SAFETY that comes with, you can attain nicotine poisoning (like alcohol's, but without the fun leading up to it) and end your wanting to do anything with smoking/vaping
**side note, I forgot to mention- I vape 0 nic and have since I got into rdas- when I first got that biggin'- when I used tanks it was 6nic if that's of any help..