I definitely think it depends on the flavors. I've gotten some that were great right off the bat (Dragon's Blood, for example), and others that I did not like one bit for months (Butterscotch and French Vanilla both tasted like ant spray). I stuck them in the back of the drawer for months, forgot about them, then tried them out several months later during a "bad
juice purge". They were finally, FINALLY! vapeable.