This is probably a FAQ, but which is better PG or VG. I just ordered an E-cig and a bunch of carts and a backup battery and atomizer. When I get done with the carts i would like to refill them with zero nicotine (Gonna leave the deadly stuff to the machines) either bought or homemade e-juice. I have plenty of ideas for homemade zero nicotine flavors, but not sure which medium is the best. Thanks in advance for any help.