Before computers, you'd start designing using shapes of cubes. Now I can start with something like a handkerchief, an object that doesn't have strong inside and outside boundaries or much closed volume.
Without a computer, every point on a structure has to be calculated with reference to everything else. But by using a PC, I can create complex curves that don't have radii or centers.
It's incredibly exciting to know people are using and living with the things I create.