Metal has a beautiful lustrous finish that shines in any light, catching the eye. The back, being ovoid, makes for tough re-positioning on the shirt as it will tend to just detach rather than move along with the magnet on the front side. A stronger, centered magnet, or a pair of magnets on each left/right side would enhance this feature. Additionally, with the current state of micro-electronics, adding a bio-touch-sensor and chirp-circuit would easily fit within the current badge's size parameters. Naturally, this would drive up cost, but I'd still buy it anyway!