To personalize, to improvize, to accessorize, to inpersonize, to idealize, to rise...
And it's good on the eyes.

Kilt pins and or brooches are not unlike tatoos and piercings, with the difference that they are not permanent. In that way, you can interchange them depending on the occasions or feel of the moment. You can carry a spare (or two) in your sporran and change it during the day (alike day pin and evening pin. Not that I want to start a casual pin to formal pin discussion... ;o)