Nearly all villains Luffy has face or the villains of arcs have been mostly based off animals. While not all are animals the majority are.
Arlong-Saw tooth Shark
Smoker-Not being counted
Crocodile- Is named Crocodile
Rob Lucci-Has Leopard...
i would like to see this any thoughts??? now that Buggy is a Shichibukai there is a chance that the other members will think he is weak and a disgrace to the Shichibukai and would be awesome because dracule is probably the only Shichibukai that Buggy would have an advantage with using his chop...