Typography is the art and technique of arranging type to make written language readable and appealing. The arrangement of type involves selecting typefaces, point size, line length, line-spacing, letter-spacing and adjusting the space within letters pairs.
Good typography is measured by how well it reinforces the meaning of the text, not by some abstract scale of merit. Typographic choices that work for one text won’t necessarily work for another. One size never fits all.
For a given text, there are many typographic solutions that would be equally good. Typography is not a math problem with one correct answer.
Our ability to produce good typography depends on how well we understand the goals of your text, not on taste or visual training.