Enjoyment and emotion in technology design

"The traditional focus of usability has been ensuring systems and products are engineered to 'fit' the user: products must be effective, efficient, and satisfying. More recently, theorists and practitioners are extending our understanding of human-computer interactions to suggest that usability is not the exclusive aim of product design. Whilst it is vital, it must also be complemented with design features that create positive experience."

In the field of technological interactions, the principle is no different. To maximise usage, advocacy, and ultimately bottom-line sales, interfaces should be designed with focus on positive emotions (pleasure) in addition to usability.