The Vignelli Cannon

"Visual strength is an expression of intellectual elegance and should never be confused with just visual impact - which, most of the time, is just an expression of visual vulgarity and obtrusiveness"

Vignelli's approach to his work displays deceptive simplicity and order, with his view that the "computer allowed anybody to design new typefaces and that became one of the biggest visual pollution of all times." and his belief that there are only 5 typefaces that should be used, that the typography of the word dog shouldn't bark, and his limited use of colour; mainly using only primary tones. 

On the subject of type, i don't agree with Vignelli's view that type shouldn't be expressive. He favored Helvetica, of course, for it's adaptability and the fact that it's open for interpretation. However i find that in some cases, the personality of typography can be utilized to further communicate the message of the design.