Yep, as much or more than vapor production, some flavors change fairly dramatically depending on what power level you vape them at.
As an example, one of my favorites, "Deadly Sin" tastes like a rice-krispies treat at low power, as you raise the voltage the cinnamon starts coming out stronger, it starts tasting like a cinnamon bun, and at high power, mostly just like cinnamon. I like both the "Rice Krispy" and the "Cinnamon bun", sometimes I want one, sometimes the other.
VV also helps you deal with different-resistance heads; you can crank up the voltage if you have high ohms, back it down for low.
IMHO, though, the taste is the reason you want VV (not the amount of vapor, unless your taste buds are really dead).