"Although in the end I found it hard to accept the structures of any organisation and ever since the mid 90s my practice has largely been solitary." -- John
The current Nichiren Buddhist organizations are based on ego, power, and the World of Anger. This is similar to most governments. Nichiren, on the other hand, advocated a type of "theocracy". Yet, paradoxically, he taught us to follow any and all with even slightly more wisdom than ourselves. However, there are no Wheel Turning Kings* at present and we are all steeped in the Three Poisons. Therefore, it is difficult to ascertain who possesses more wisdom than we ourselves. Equally, the Lotus Sutra and Nichiren speak of good friends in the Dharma all being equal and a necessary condition for us to attain Buddhahood.
The bottom line is, we can only be certain that Shakyamuni Buddha and Nichiren Daishonin have more wisdom than us. Therefore, it is only safe taking them as teachers. It is best to look at all others who practice the Sublime Dharma of the Lotus Flower Sutra as good friends. This obviates both a restrictive faith and allows for a loosely structured organization of equals.
*An ideal Buddhist ruler capable of spreading and protecting the Buddha's teachings.