In an interview with the Volkskrant (26-09-05) the four females of the Swedish designerscollective Front brought up a solution in the never ending search for usability nirvana. The solution is quite simple and perfectly balancing on the edge between aesthetics and functionality. In the interview is suggested that creating a product that needs an explanation to be operated is giving this product a personality and thus is creating a bound between the user and the product. An example is the cd-player. A cd-player is (to most of us) an non-personal object. Front has made a cd-player in a glass vase. “No one knows how a cd-player like this works, if you show this a person and product will bind more easily”.
Below is a figure giving an indication to position a few products between usability / personality (emotional)
more about Front: http://www.idonline.com/features/feature.asp?id=1329