Congrats! He looks inspiring I hope you give him more life than just this one drawing) However, a little touch on his eyebrows, make and angle in them, would give him more masculinity. Also, his hat stands a bit too high on his head. You could make is smaller and it would sit there more comfortably. Yeah, and you know us men really don't have that slim abdomen. Making it just a tad wider would also help the manly posture. The background of the uncoloured one is quite superb Great choice of colour too Are you planning a web comic or .... ?
Wow I wanted to let you know that your conceptual illustration work is really nice. I love seeing your line and work right next to your coloring as I think to myself I could do that (glancing at the line art)... until I see the final colored version. Your work is so amazing and I love the detail that you put into your work.