Great words of insight (as usual) from Don Norman in an interview with
One wants deep understanding, the other wants to know what to do next. One is happy as soon as an idea has been demonstrated, even if it is held together only by tape, string and mirrors–that is, even if it only works on special cases and requires careful attendance and repair by the research group. The practitioner wants something complete, robust, and reliable. Researchers are incapable of delivering this; they are too curious, too driven to learn new knowledge. The practitioner is too practical.
Everything has a personality: everything sends an emotional signal. Even where this was not the intention of the designer, the people who view the website infer personalities and experience emotions
Stay curious. Always be learning new topics [...] And I talk mostly with my critics.
Read the full Don Norman interview on Design Research and Innovation.