Asymmetry or irregularity.
The idea of controlling balance in a composition via irregularity and asymmetry is a central tenet of the Zen aesthetic.
The enso (“Zen circle”) in brush painting, for example, is often drawn as an incomplete circle, symbolizing the imperfection that is part of existence.In graphic design too asymmetrical balance is a dynamic, beautiful thing.Try looking for (or creating) beauty in balanced asymmetry. Nature itself is full of beauty and harmonious relationships that are asymmetrical yet balanced.
This is a dynamic beauty that attracts and engages.