This is somewhat of a science as I am learning. I think Tribeca and Heavenly Army have been the biggest lessons for me. Tribeca was just ok for me after a week, it is completely aweeome after six weeks. Heavenly Army was just not good IMO the first week, I think it's a solid vape at 6+ weeks. Boba's is better after a few weeks, so are a lot of the other tobacco flavors.
Seems pretty simple IMO. If the juice has multiple flavors it needs time to coalesce, meld, open up. Fruit flavors can be vaped out of the mail and they are good, maybe the same at 4 weeks than they are on day one. These tobacco flavors change IMO however, and they change for the better. I never went so far to say I disliked Tribeca, but it is just so better after it has had time to find itself.
I have HHV Huntsman and Dragon's Fire at about a month now, Allusion Smooth Criminal and Caramel Wild Wood at about two weeks. I just got a new bottle of Tribeca in and I won't touch that until the new year. I think I have a routine down now, as long as I have Heavenly Tobacco, Tribeca, ECBlend RY4 and Hangsen RY4 on hand and properly steeped, I can wait on everything else. the temptation is there, but I can resist as long as I have my go-to juices to...go to.