Enso - Zen symbol of Absolute enlightenment, strength, elegance, the Universe, and the void; additionally it also represents the Japanese aesthetic itself. As an "expression of the moment" it is often considered a form of minimalist expressionist art.
This tattoo is on my right wrist. I always liked what the zen circle (or Ensō) symbolizes: enlightenment, strength, sometimes infinity and imperfection. Now I have found the meaning why I have it on: because I’m just as imperfect as this unfinished circle, and this is how it should be.