The single most important skill.  

Basketball has many unique elements to the sport.   Chief among those unique traits and in real comparison to the other popular team sports (Football, Soccer and Baseball) is the SIZE OF THE PLAYING SURFACE.  It’s not even close.  Basketball is played on a TINY surface compared to these other sports.  And while vision is an important skill in all sports, because the playing surface is SO SMALL in basketball, vision is the # 1 skill. If you can’t see the entire court all the time, you really can’t play at a high level.