WIPs
Be careful of shading with samurai sets, I have owned a samurai set made by 13chillz and the shading was perfect, but I have seen other sets of this theme that have trash shading and ruins the set. The sketch looks good so far, can't wait to see new WIP's
As for the 3d objects and such, I think the Gangsters bandana would be the only thing that you could make look decent with this theme, at least for the head. For the arms, I could see you making them go well with the right and left armblades or maybe the punkspikes, or even the hidden blade.
This is a very early wip as I see, but I saw what you did with that Atom set, I am sure you will make this a beautiful set! Are you thinking of jointing this by the way?
Copy that on the shading, I am not liking working with the Electric Yellow color, as its so bright as it is, kind of the only way to shade is to make it darker, and darker, and darker, Lol. I think the armblades may look nice, however I would have to craft the set around the idea of it. But we will cross that bridge when we get there. And yes, planning on doing a full jointed set.