It is the common wonder of all men, how among so many million of faces there should be none alike.

The same handful of components, arranged slightly differently, never repeats. Every face has the same parts in the same places, and the variation within that narrow range is enough to distinguish billions of people at a glance. It applies beyond faces: constraint does not reduce variety, it is what makes variety legible. Infinite freedom produces noise; a tight form produces individuals.

Where you feel limited by a format, a role or a set of rules, look at how much room there actually is inside it. Most people use a fraction. The distinctiveness available within the constraint is usually more than enough.