Judging by his appearance I believe this is a more modern version of him. I am not bothered by the "ghetto" look at your Jax honestly. I've seen many individuals that dress in husky, baggy clothing and they are covered in tattoos as well, however they are intelligent and have the potential for successful futures.
If I were told to look hard for a flaw I say it's his left hand. It's not proportional to his body.
Overall, I say this is awesome concept sketch of Jax and I'm looking forward to more work from you in the future.