I think it's funny that the chart starts with "drop the Keystone Light". If you have more than one Keystone Light, you don't care about the taste at all. You're deliberately drinking it for the alcohol (I guess).
I appreciate the chart's mention of "mouthfeel". That might be included in their use of "smooth", rather than strict flavor definition. I use that concept a lot describing wines - where the lighter, tart-er ones will skip across your lips, bounce off the tongue, and get swallowed while leaving their flavor to be experienced and disappear, and the rich reds will adhere to your palate and force you to essentially "chew" them before you can swallow. The liquid itself isn't particularly thicker. The experience just sort of works that way.
I don't drink a whole lot of beer because the beer I prefer is heavy and makes me sluggish. Frankly, there's too many other things I enjoy more than beer.
The wife likes IPAs. Those taste like broccoli to me.