The worst part of quitting smoking the old fashioned way is the constant nagging cravings.....even years later.
PG liquids are a bit better for throat hit. When I use 0 nic I have a few things I add to my liquids. A couple drops of menthol flavoring can kick things up a bit, without tasting like menthol. I found another additive (flavoring) called flash...just a drop or 2 goes a long way, more can be a bit harsh. ( http://www.ecigexpress.com/flavoring-tobacco-flavor-c-16_24/flash-e-liquid-select-size-p-610 )
Cinnamon flavoring also seems to help.
For me personally, I can live with the nicotine. But for many, Like Mcquinn, nicotine is off limits (or at least mostly)