I've noticed that most aromatic blends I've tried have a certain taste in common. I've always associated that taste with the propylene glycol (added as a humectant). I know that glycerin is also used as a humectant in tobacco; and glycerin is also (according to Wikipedia) used as a sweetener in some foods. I got to wondering if glycerin is used in most aromatics to give them that sweet taste. I finally tried an e-cig, which was made with propylene glycol and it did NOT have that same "aro taste". There are certainly blends that have some kind of humectant added like PA, CH, and SWR, but they do not have what am calling the "aro taste". Then there are aromatics like Erinmore, Condor, and Firedance that do not have that "aro taste" (to me). I guess I'm wondering if other people have noticed this? It seems to me that most aros are laced with something, other than the intended flavor (cherry, maple etc.) that gives them a common taste. I wonder if it is glycerin rather than propylene glycol?