I found Bullet Bob to be very monotone, and he basically called every race the same, such as, "they're off", so and so in the center of the track tries for the lead. He never made a race sound exciting either. Guess he figured New Yorkers wanted a no nonsense announcer, unlike Jack E Lee when he called at Roosevelt and Freehold.
I always thought Bob called races like a robot, and he often totally missed horses coming wide in the stretch, he would announce 4 horses names down the stretch and a totally different horse would win.
Sometimes he hung out in the top floor of the clubhouse at YR, I spoke to him once or twice and his talking voice was not that robotic voice he used when calling races.
IMHO, Jack E Lee was the best caller I ever heard.