In all fairness, it's me (the friend). For custom made orders, steeping may help. Taste is subjective and some of the flavors one person likes, another will/may not. When you get a custom made order that's mixed at the time of order, my experience has been that you can vape it immediately, but for the most part, it needs time to sit. I throw my stuff in the cabinet for a week, taking it out daily and shaking it. Some liquids (depending on chemistry) will change color/smell/flavor over time. With that being said, I had some juices that had a really pungent taste/smell while vaping, similar to a perfume taste/smell. I put them in the cabinet for a week and tried them again. The taste/smell was still there, but greatly reduced. The remaining flavor was the same, but what made the juice unvapeable was the perfume taste/smell. This wasn't just one bottle from a vendor with this characteristic, this was apparent in about 10 of their flavors.
By comparison, stuff like Dekang/etc that isn't made to order or coming from overseas, that stuff requires zero cabinet time.
There really isn't a right/wrong between custom made or pre-made. For me, I like having custom made flavors and I'm willing to wait a while for that experience. Additionally, if it's from a vendor I trust, I can reasonably conclude that there isn't any funny business going on with my juice, as compared to a mass produced product.
