Gray Holland of Alchemy Labs has a great article up on Core77 about the relationships among form, surface curvature, and emotion. You can argue some of the technicalities around class-A surfacing and “C” versus “G” continuity definitions, but his insight into the fundamentals of form is quite enlightening.
He also has a great perspective on the now-decaying debate of “engineering” versus “design.”
When we speak of product development, we frequently look at the domains of Design and Engineering separately, evaluating them in different ways. Engineering, at its core, is a measurable process; Design, for the most part, is not. This gives the former an inherent advantage: engineering efforts are easily quantifiable, and this provides them with authority. Design is intuitive, working on the non-verbal levels of our experience, sometimes triggering our most subversive emotional states; this makes it difficult to evaluate empirically. Lacking an analytical vernacular, Design is labeled subjective, when it is actually the agent of universal truth through form.