Well, make the smoke kinda swirl around in the background... Have him flick a cigarette in a carefree way, while replacing one from out of is cig. case. Make the knife drip a little blood like he just finished his target, hell, if you can have a dead body on the floor with a knife in its back, that be great. For the pose, He could be leaning up against a wall or something. You're smart, you'll get it. Basically, think of a spy who thinks he is better than everyone else. I dont know, this is the first art I ever commissioned for. ._.
`Midna I only met you just yesterday, but the 10 minute or so convo we had would have made you my second choice. You're awesome, who couldn't love you