Ninjutsu and jazz have a lot in common. Both allow you to express yourself and both have a strong core.
Jazz allows a musician to make a song his own by inserting his personality, emotion, and personal style. Some people don’t like jazz because it doesn’t exactly conform to it’s own musical roots. No two jazz performances are identical.
All of that can be said about ninjutsu. Its core concepts are strong enough that the individual practitioner can express it in a way that is unique to him yet true to its roots. If performed correctly, ninjutsu is invisible to the point of not looking like martial arts to the untrained eye. And no two altercations are identical, so ninjutsu has to be adaptable.
Our ninja martial art is amazing in that it allows that level of personal expression without losing itself.