
Most body-type advice is built on a system of shapes named after fruit and letters, and most people cannot confidently place themselves in one. That is not a failure of self-knowledge; the categories are crude, and plenty of bodies sit between them. A more useful approach to dressing for your body type skips the label entirely and works from proportion, fit and what you actually want to wear.
Shape systems exist because they are an easy shorthand, and there is something in them — garments do sit differently depending on where you carry width. But they get treated as prescriptions, which is where the trouble starts. Told that a shape "cannot" wear something, people avoid clothes they like on the authority of a magazine.
The honest version is narrower: certain cuts emphasize certain lines, and whether you want that emphasis is your decision rather than a rule. Confidence comes from understanding the mechanism, not from obeying a chart.
If there is one thing worth taking from all of this, it is that a well-fitting garment in an unfashionable cut looks better than a fashionable one that does not fit. Shoulders that sit at your shoulders, sleeves that end where they should, a waistline that lands on your waist rather than above or below it — these do more than any styling trick.
This is also why tailoring is the best-value money in a wardrobe. Taking up a hem, narrowing a sleeve or nipping a waist costs a fraction of the garment and changes it completely. Two altered items you wear constantly are worth more than six that hang unworn, and a local alterations shop will usually quote on the spot.

You almost certainly own two or three things you reach for constantly and feel good in. They are the best data you have, and better than any guide. Lay them out and look for what they share — a neckline, a sleeve length, a rise, a fabric weight.
Whatever the pattern is, that is your brief for the next thing you buy. Most useful wardrobe advice amounts to noticing this and then buying more deliberately, rather than starting from a shape chart and working backwards. It also cuts returns dramatically, which is its own reward.
Comfort, mostly. Not loose clothing — the absence of adjusting. If a waistband digs, a neckline slips, or a hem needs pulling down every ten minutes, you will spend the day thinking about your clothes, and that reads on you more clearly than any silhouette.
The related trap is dressing for a body you are planning to have. Clothes that fit the body you have today look better than clothes bought in hope, and it is a straightforwardly kinder way to get dressed. Good style guides tend to arrive at the same conclusion from a different direction.
Measure yourself properly, pull out the three things you wear most and find what they have in common, and take one item you like but never wear to be altered. That is a small afternoon of work and it changes more than a season of shopping. The rest — the letters, the fruit, the rules about what you cannot wear — you are free to leave alone, as most practical fashion guides now do.
Wardrobe questions take up a fair amount of FactMates.