My S.O. was never a smoker, but since I've transitioned from smoking to vaping, she's joined me with 0 nic flavors. She generally only uses her mods (Vision Spinner or a Kamry pipe mod) when she thinks she's hungry late in the evening. She'd seen The Doctors talk about vaping as a deterrent to random snacking. Neither of us tends to snack at night as much anymore (I pretty much chain-vape when I get home from work LOL) I'm not claiming this as any form of weight-loss initiative, but she's lost about 10 lbs since February (she was diagnosed with Multiple Sclerosis two years ago, and her mobility can often be limited, depending on how the MS affects her on any given day. We try to get to the gym, but sometimes that just isn't feasible.)
Long-winded story short, I personally have no reservations about someone (of legal age) picking up vaping - plenty of great flavors out there, and no need for nic.