You always hear about the harmonics, the knowledge of harmony, the stamina, the intonation, the sheer dexterity... But I was thinking about the variety of his attack and plucking hand placement. On his first album alone, he goes from staccato and thumpy ("Come On, Come Over") all the way to making the notes beautifully "ooze" out of the bass ("Continuum"). Before him, the great players -- even Jamerson, Jack Bruce, Stanley Clarke -- more or less put their plucking hand in one place and didn't vary the attack. It was just another eye-opening discovery for all of us who heard that first album when it was released. The electric bass could be played like a real instrument!