Cool a fresh and new SB. how come you never started any before?
I quite like the blueish shadows. The guy in the dooropening falls a bit to the side. The column in next to him feels a bit ackward. Im totally not into drawing like this so its hard to comment.
I think a bit of line work to help show focus would be nice. The edges are alright, but it's a little plain. I think some linework would help show some wrinkles in the fabric and the thickness of the dark parts of the costume (mantle and waist thingy).
A better shine on the glass, too. Also, some shine on the gray things on the mantle and waist thingy, they look like they are metal of some kind, like tin or aluminum, like a crazy costume from old scifi. You know I love that kind of crap, like old Doctor Who.
Therefore, all-in-all it's a great costume, it just needs a little more work.
Oh, avoid the urine yellow background next time though.
I think the merchant table is fine where you had it. You could try different angles though. I would definitely keep it, or something else, there. Otherwise its a fairly large hole in the picture plane.
I would make the ground more discernible from the boxes on the right side of the picture. I mean, unless there is a sudden drop off and these box huts are really box sky scrapers.
Grimier hands would help him (like you said). Plus posting his personality traits would help to understand the character. I remember you mentioned him as the guy that finds the good stuff, like a pirate of junk. So, a long jacket with large cuffs, like the stereotypical pirate, but make it heavily worn, dirty, torn, junky, and so on. The scarf is a nice touch though.
I'll say more, if/once you post some of his traits.