The one single aspect that makes for impressive knives is freedom. The knifemakers freedom to make what he feels he must make, freedom from those who seek to define art and dare to inforce their prefferences upon others. The knifemaker who knows true freedom does not seek approval, the knives are for himself with purpose in mind. He can defend each and every aspect of his art, there is a reason for every thing that you can see, feel and discover from its use.
Handles from corncobs to solid gold can qualify. The knifemaker who learns to fly higher and faster through his knives does so without speed limits or restraint, it simply being there, his perfection that makes the knife. If your knife touches you, it qualifies as art. If it honestly touches you it will touch others. Many artists live in poverty, their gift is to those who share his dream, dreams are not an economic entity, they are expressions of freedom when a healthy mind seeks self through his art.
When organizations seek to define art, when they seek to judge art, they fall into the muck of critics that have plagued art since the beginning of time. They also make the artist who knows true freedom special.