Very well done. Awesome shading.
Could really use a background but i guess its fine like so great job !
I only have cliche background in mind like London factories so don't really listen to my advice.
Love the style :D and his expression is really good :D most definitely a delinquent :D
To be honest, for somebody who doesn't know a thing about art, it's not looking that special for me at first glance.
But, from the look of the line art, proportions (and especially the smoke) i could have been telling immediately that this is a JamesLeeZeroThree piece.
Great composition. Great work.