I love the Vivis - regular and mini, but there are times when the flavor is muted.
I don't know why, and a lot of people have mentioned this. Sometimes the flavor
is excellent.
The answer to Buggs question might lead you to a better flavor. If you are using
the higher ohm atty for the Vivi, you might need to vape at a higher voltage. That
doesn't always fix it, but it's a good place to start. Other times, lower voltage may
bring the flavor out.
The draw can affect throat hit. If the draw is too airy or not airy enough, it can
make a difference. You can test it by looking at the connector to find the air holes.
You can block one of them by breaking off the tip of a toothpick in it. If that doesn't
help, you may need more air flow (I doubt that's the deal, but maybe). If you need
more air flow, you may have to enlarge the holes, but do that as a last resort, and
follow instructions from people who have done that. I haven't, but I think you can
find vids on YouTube.
Also, Vivis have a habit of darkening some liquid. When it does that, the flavor will
get dull and it's time to change the oil. Be sure to keep the heads clean and free
of gunk.
Good luck.
BTW - to me, the mini is a better vape than it's bigger brother; better flavor and
throat hit.