He really is a mishmash of many things existing in harmony when you think about it, especially if the theory about Sora being a former marine is true. God and the Devil, a Royal and a Peasant, a Marine and a Pirate, a Chef and a Fighter, Moral and Amoral, a Pervert and a Gentleman, a Human and an Experiment. And he's the only Straw Hat who can swim, fly and walk through fire. All things in union and he seeks the place where the world unites. Poetic.
Only thing that stands in the way of that harmony is probably his fear of his evil Germa nature.