Intriguing article on why we love rounded corners: http://www.basement.org/archives/2005/11/why_do_we_love_rounded_corners.html
Interesting read, but I disagree with the hypothesis given forwhy we (currently) love rounded corners.
I would guess, and history will prove me right or not, that theprimary reason we love rounded corners is nothing more substantialthan temporary differentiation.
On the web, for instance, it remains true that rounded cornersare a minor barrier-to-entry of “cool” website designs (I had towaste an hour of my life making those silly rounded corners on thisblog in Photoshop, and then playing with CSS and tables so theyworked properly in the major browsers), so they do, to a very smalldegree, differentiate a design. By the same token, there was a timewhen everyone thought that animated cursors, background music, andintro flash graphics were a great thing because each of themrequired a bit of knowledge and effort. It certainly isn’t a giventhat such preferences remain.
Earlier I said that history would prove me right or not, butreally there is plenty of historical evidence already demonstratingthis recursion of aesthetic preferences: Design trends have tendedtowards extreme roundedness(“organic”), back to squared and sharp (“modern”), then back to rounded, then back to squared and sharp, in an endless cycle. You can look invirtually every market (cars given as examples here) where thiscycle took place, with each design philosophy welcomed asinteresting and fresh looking, but quickly evolving to old anddated as everyone followed suit.
Soon enough everything old is new again, and it repeats adnauseam.
I would predict that as more and more blog templates incorporaterounded corners, and CSS3 makes them absolutely pedestrian, roundedcorners will become the domain of the amateur johnny-come-lately.At that point we’ll be talking about our next-generation,ultra-modern square corners.