The impossibility of being a modern Nietzschian ought to be obvious, but has been spelled out lucidly and irrefutably by Alasdair McIntyre (especially in his Three Rival Versions of Moral Enquiry, 1992) - but most clearly in the phony lives of the most famous/ notorious would-be Nietzschians such as Heidegger and Foucault.
Another expose of the impossibility of modelling oneself on a nihilist is the leading modern German philosopher - Peter Sloterdijk. It was, indeed, the message of Sloterdijk's first book - Critique of Cynical Reason - which I read first in 1988 - that the only consistent way of taking on board the Nietzschian perspective was to become something like the Kynic Diogenes - in the aspect of supposedly living naked in a barrel, and indulging whatever urge comes into ones head: becoming, in effect, a non-conscious animal.
The idea of this same Diogenes as a kind of Holy Fool, who taught the citizens by stunts designed to expose their absurd pretensions, cannot be included in the Nietzschian ideal, since this is not nihilistic - it is merely a different means to the 'establishment' end of teaching Virtue.
Thus, for a serious Nietzschian, there is no way of being both sincere and a Professor - and the twentieth century lineage of counter-cultural Professors (including Heidegger and Foucault and their countless tenured radical clones) is abundant evidence of this impossibility.
A person cannot regard Nietzsche as an authority, and believe his ideas; cannot unmask the pretensions of scholarship and write scholarly books on Nietzsche; that same person cannot set himself up as an authority in anti-authoritarian ideas (which must be correctly learned). All this is self-refuting, paradoxical nonsense of the most obvious in-your-face kind.
Such activities reduce to mere careerism, and nothing else whatsoever.
Peter Sloterdijk has gone down this path himself, presumably with his eyes wide open - and has a successful career as a Professorial Nietzschian and a second string as a Germanic version of the ultra-highbrow TV pundit and culture critic.
All this he richly deserves since the man is vastly erudite, witty and highly creative - a firework box of flashing micro-insights.
Nonetheless, I suppose nobody is more aware than himself of the phony nature of his position and the fakery of his basic existential stance.
In the end, Sloterdijk is an entertainer - and as such he provides what is good about entertainment, and also what is bad about entertainment - in the sense that his ideas are a vastly interconnected distraction from that fact that they do not and intrinsically cannot add up to anything substantive (which is, in fact, his main substantive thesis).
If someone is looking for meaning, purpose and personal engagement in life; they will not find it from Sloterdijk; they will instead, perhaps, be drawn into an endless conversation which they may enjoy enough to keep them there for a long time - perhaps until it is too late.