Designing stuff is entering the realm of the unknown. You...

Designing stuff is entering the realm of the unknown. You wonder, is it going to work. With modern stuff, the temptation is to be bizarre and striking, but these pieces can walk themselves from the living room to the back room, to the upstairs, and then to the attic. They wear you out. The challenge is to create something with staying power. That's the real challenge to me.