DETROIT — In choosing a seat mate for a long flight, Pistons forward Saddiq Bey might not be very many people’s first pick. He’s naturally quiet. He chooses his words carefully and he probably would prefer reading a book than talking at length in a casual conversation. Bey is measured, seemingly not wanting to say too much — not because he’s afraid to be wrong, but more likely because he’s going to be right. His humility could get in the way of being right too much. In choosing a player to be the centerpiece of the Pistons’ rebuild, general manager Troy Weaver made a good choice, engineering a…