[andrewas]

monks reach their true potiential at the higeher levels. a naked level 20 monk will eliminate almost any standard creature without breaking a sweat. a naked fighter would have a much harder time of it.
a monk is soloable, a base fighter is not, which is another point if his favor. (yes, you could solo a fighter, but i dont think youll get very far)

(note to the mad - naked means no items/weapon/armour, not actual nudity)