The NBA has grown into a league of dynamic, athletic players that run the floor explosively and play above the rim. Many prospects are looked at for athletic ability because General Managers know that this intangible puts people in stadium seats.
Sports in America are amazing due to the pure athleticism that is shown by athletes. Even in sports that are not generally thought of as American, the United States can compete because of the type of players that are here.
The NBA is a league that is predominantly composed of American-born athletes. The excitement of school yard-type of play mixes with the athleticism of these athletes and makes the NBA one of the most exciting sports leagues to watch.