Me too.. I am really excited to be getting my kits because I don't want to be buying anymore cigs. I am very curious about nic salts because those were not around in the ol' days, and what I can and can't use those with.
There's an excellent post above about nic salts, to which I'll add a few more points. Nic salts were developed particularly for low-powered pod mods. The goal was to reduce the throat hit so the nicotine concentration could be bumped up higher. The original breakdown was:
Pod Mods - Low powered, deliver very little juice per vape so tend to have very high nicotine concentrations (often 25 - 50 mg/ml (a.k.a. 2.5% - 5%))
MTL - Mid-level power, moderate juice per vape so moderate nicotine concentration (often 3 - 20 mg/ml)
DL - Higher power, plenty of juice per vape so less nicotine per ml (often 3 - 6 mg/ml)
By varying the amount and concentration of ejuice, you should be able to get roughly the same level of nicotine regardless of the style of vape you prefer.
Anyway, as you can see from
@HigherStateD's post, salt nic has moved beyond the pod mod. Like most other aspects of vaping, it's now a case of 'whatever works for you'.