The illegible quick signature shows that he has determination to reach his goals.   The straight slash of the "y" indicates he can cut out non essential and get to the point.   The "C" in Cosby starting way below the line -- a quick straight line-- again show tenacity and a certain amount of stubbornness.   The pointed top of the "B" indicates he is aggressive.   He insists that everything must be done correctly, but he will leave the details to others.   He is able to think on his feet but he is more comfortable when he is able to gather, review, and scrutinize information before taking action.