I’ve always had a fascination with samurai and the samurai code of honor and I’ve always thought pirates were cool. Zoro is both a swordsman and a Pirate. What I love about him is his unbreakable spirit to achieve his goal as the strongest swordsman in the world. Visually he is very unique, he fights with three swords, one in both hands and one in his mouth, not to mention he sports the color green my favorite color so he gets major points for that.
Through each fight/confrontation Zoro learns more about himself and swordsmanship and soars higher and higher. He also cares deeply for his friends and fellow Straw Hat pirate members. If you want to know more about Zoro here is his wiki page. http://onepiece.wikia.com/wiki/Roronoa_Zoro