In studying I Samuel reading about Saul, the first King of the Israelites. God allowed this once humble man to be their First King. God didn't want the people to have a "human" king; He wanted to be their KING!
God comforted Samuel, the last Judge, as He explained to Samuel that the Israelites weren't rejecting him but God the Father. God was prepared to give them the desire of their heart...a human King, an imperfect human.
As He instructed Samuel as to the process of the transition from Judge-ship to a monarchy; God gave Samuel a warning for the people regarding the "costs" of an imperfect, human king: I Samuel 8:10-22