Any flavor that is carried in fats. For example:
Ice cream tastes delicious (and has wonderful mouth-feel) because of the butterfat in the cream. The fats in the milk are what is carrying the flavor of the milk to your taste receptors.
It works the same way with meat as well. Vegetarians may want to turn away from their monitor now...

When you eat a hamburger with a 95/5% mix (95 % protein and 5% fat) you get much less flavor than a burger made with 80/20% mix. You pay for that flavor by gaining weight if you don't excersize-but hey it tasted great, didn't it!!
Foie Gras for example is about 99% fat, stuff tastes delicious!
So the issue then becomes that your taste buds get saturated (pun intended) with that thick fatty flavor and get "burned out" on that flavor. But I love that rich flavor! What can I do?
Add some (and by some I mean a tiny bit at a time until the flavor "pops") acid to the mix, that acid overtone will bring the fatty flavor back to life. Add some reduced Balsamic Vinegar drizzle to your Foie Gras or serve it with Green Apple slices. Ketchup or Mustard on your burger will surely complement that rich Beefy flavor (carried in the fat).
So maybe a tiny amount of acid flavor
may help the Vienna Cream "pop". I haven't tried it so I can't say it
will help. But from a culinary standpoint it makes some sense to me as a Chef...
Hope that helps!!
Vape on my friend!!