Does the vanilla stuff need much steeping or is it more as one poster said the fruitier kind that need that process for the flavors to come out?
From my experience it's a little broader than that. I find it's more likely that if one liquid from a particular place needs days (or weeks) of steeping, they all benefit from (need) about the same amount of time. It's pretty typical for the average liquids vendor to get their flavoring components from the same place. Someone mentioned that they get an "alcohol" thing coming off their MBV liquids. I don't
sense that with MBV stuff, but I do get it from almost every liquid I get from a different place. For us, it takes about the same amount of time for that alcohol smell to dissipate from everything we get from the same places.
Some flavorings use alcohol as the carrier, it can be nasty, and this is one where leaving the cap off and "breathing" does help. I actually "breathe" the bottles on those by squeezing and releasing - working air in and out of any air space that might be available to hurry the process along. (And I usually don't reorder from places when I have an "alcohol" issue. That one place? For me it took 4 to 6 weeks to drive the alcohol off. But since they quit selling that line of liquids anyway I'm not naming names.)
On a more pleasant note, I pretty much find that all my liquids from The Vapor Room follow the same curve: No "alcohol" problem going on here, but if it's a fruit or a tobacco from TVR they all start out a little weak and the flavors taste a bit "raw" on day one. By day three they have mellowed out and balanced. At day seven the flavor intensity is much stronger and... for TVR stuff that's about as good as they are going to get.
Overall these are reasons why it's never a good idea to place whopper size orders from a place you have never tried before. 'Cause if there is something you find unpleasant with that first bottle you try from your VaperzRUs order, there is a chance it's gonna be a repeat performance with the other 29 bottles in that order from the same place. Stick with sample sized bottles on first time orders, and try to keep it down to a half dozen samples or less.
P.S. About the vanilla: Experience tells us that vanilla is one of those overpowering flavorings. Overdone, it can simply overwhelm everything else in a liquid. You might just be experiencing that difference between your liquids that have vanilla, and the ones that don't. It is something to pay attention to and consider when ordering. In general, adding extra vanilla flavor if you have that option? Bad idea...