Foucault's biggest inspirations were Nietzsche, where Foucault gets the basic notion of power's universal systematicity (everything is already/can be articulated as a master/slave relation); and Heidegger, for whom the core essence of Being was always and eternally retreating from sight. combine these two notions and you get someone endlessly searching for a power he knows is screwing him but which he can't see or hear or touch. and combine THAT with generally declining career prospects for left-leaning Anglos studying continental philosophy... yes i'd say you have yourself a personality type.