The controls
Everything you taste is ten levers in some combination
Five of them are tastes proper, detected on the tongue. The rest are sensations the brain files under flavour anyway: fat, burn, smell, texture, temperature. A cook adjusts these; an eater learns to hear them separately. Learn to ask which lever is pulled hard, and which one is missing.
Taxonomy
Four forces make every flavour there is
Classifying food by country tells you where it was eaten, not what it tastes like. Classify instead by what was done to it. Flavour comes from time, from water, from fire, or from the hand — and the dishes people rate highest almost always stack two or three of those forces on one plate. Each dish below shows its main force, with dots for the others it borrows.
The central tension
Richness has to be paid for
The oldest rule in cooking is that fat needs acid. Fat coats the tongue and dulls it; acid strips it clean and resets the palate for the next bite. Plot the two against each other and the food you keep going back to sits on the diagonal — every gain in richness matched by something sharp. The corners are where dishes fail, and each corner fails in its own recognisable way.
Vocabulary
Words that do work
Vague praise is the enemy of a developing palate: if the best you can say is "amazing", you cannot tell tomorrow what you liked. These are the terms worth owning, each with the case it actually fits and the near-neighbour people mix it up with. Use one precise word and the memory sticks.
Practice
A palate is trained, not issued
Three things move it: paying attention in a fixed order so nothing gets skipped, tasting things side by side so differences have something to be different from, and climbing gradually into flavours that are unpleasant at first and load-bearing later.
The order of attention
Run this on one dish per meal. It takes fifteen seconds and it is the entire difference between eating and tasting.
Calibration drills
Each one is a side-by-side comparison you can run at home for the price of a few ingredients. Tasting one thing teaches you almost nothing; tasting two things that differ in exactly one way teaches you that one thing permanently.
At the table
Most eating happens in restaurants, where you are choosing rather than cooking. These are the moves that turn a meal into information.
Climbing into acquired tastes
Bitterness, funk and burn are defensive reflexes — the body reading possible poison. Tolerance is built by repeated safe exposure, in order, which is why these are numbered. Each rung should stop being difficult before you step to the next.
Side by side
Two dishes, one difference
The useful comparisons isolate a single variable: the same broth clear or emulsified (phở against tonkotsu), the same fish raw or cured (ōtoro against salt-cured anchovy), the same sugar sweet or burnt (gelato against crème brûlée).