I really dig the Shade Fist one--checked your DA site out too: Love the Harley, Graffiti the Bandit, Kichi Fire and several others.
Very nifty. 
Done just with markers, though? If so.. extra neat, because I tend to panic when I use anything but pencils. D:
Some were done with a quick pencilling outline, others were done while I was bored and letting my hand go free.
Graff's Deviant Art!
http://eargasm.deviantart.com/
So it's been awhile since I've posted anything, but I've been doing a lot of marker sketches so I figured POST TIME! (As a note this thing was being a huge pain in the [censored] when I tried to post so direct links ftw.)
http://tn3-2.deviantart.com/fs27/300...by_Eargasm.jpg
http://tn3-1.deviantart.com/fs30/300...by_Eargasm.jpg
http://tn3-1.deviantart.com/fs27/300...by_Eargasm.jpg
http://fc06.deviantart.com/fs27/i/20...by_Eargasm.jpg
http://fc03.deviantart.com/fs25/f/20...by_Eargasm.png
Graff's Deviant Art!
http://eargasm.deviantart.com/