First off, hi all, new to the forum, etc.
I don't personally like a strong throat hit and got off the stronger cigs years back due to easily getting a scratchy throat and generally vape at 4-7mg strength (custom mixed liquid) and I've been trying to beef up the feel without going for that extra nicotine. I've found that 0mg doesn't give any throat hit with a standard liquid, which is what I was using during the scratchy coughy transition period, but adding menthol crystals/liquid can give some body to the vapour. It doesn't feel like nicotine but allows you to feel the vapour going down, and that's good enough to keep it enjoyable without the chemical addiction. Menthol crystals in particular are really strong so you do have to rein yourself in and avoid adding more than just a hint to get a stronger body (it'll wreck your throat faster than nicotine), and it works best with sweeter flavours rather than tobacco. I actually had some luck making a 0nic liquid using Perfumer's Apprentice hazelnut and coconut flavourings in a cheap halved strength Dekang menthol PG base. Gives a really nice smooth vape and the menthol isn't strong enough to drown out the subtle nuttiness if you halve the base liquid. I do think the success of this has something to do with hazelnut too tho, since the buttery note of that flavour can also add some body.
Basically, experimentation is key and mixing your own liquids is essential for a satisfying experience without the nicotine.