Watched a couple of interesting interviews with Chris Morehouse, the Sharks Director of Amateur Scouting. He confirmed the importance they place on choosing players who fit in with the current culture & identity of the Sharks.
He said their guideline is "competitive kids that care", and when they discuss drafting certain players he'll ask his team "would YOU want to play with him?"
They consider hockey a "people-based business" and care about how players handle themselves both on and off the ice. They are being very deliberate with which players they draft and making sure they fit the "identity of a Shark".
I get the sense they are very comfortable passing on players whose personalities don't mesh with what they're consciously trying to build in San Jose.