I have officiated Basketball, Baseball and Football for over 20 years. Of the three, basketball is by far the hardest. Baseball would be next and it isn't as easy as it looks. There are so many interpretations to the game. Football is a piece of cake. I might feel that way because that is where I have reached my highest level of competition. If you know your rules you are way ahead because most people don't know them very well. Also, everyone watches the ball and most penalties occur away from the ball.