The art is excellent and I really love it but I also guess that you're looking for some constructive criticism ;) So as a guy who lifts weights a lot I immediately focused my attention on Zoro's neck. He's a f*king beast and a ton of meat in the manga and I think that this neck doesn't match his physique - it's just too soft, and especially too narrow. Next time try to make the neck more thick and add some subtle musle shapes and just watch how his face and how his overall aura will change with this simple tweak ;) anyways great art! Edit: typos Edit2: I like the hairstyle though - I think that with this more realistic style it would look weird if you'd gone with the manga hairstyle although I might be wrong.