@lupyuen Norman's design theory is absolutely essential reading, not just for interface designers. Having studied the epistemologically-impactful philosopher Gaston Bachelard and realized how profound all of our initial experiences with archetypical artifacts are - door knobs, light switches, telephone dials, etc - you realize that Norman's application of object-theory into interface design is essential for anyone in technology to comprehend.

Bad design is intolerable. It's reflective of humans inconsiderate and disregarding of culture.