Have you ever considered using shapes and such before doing the image? Sorry, just giving a little constructive cristisism. You have talent, but you could improve it by mapping out your image before actully detailing it. What's good to do (this is for all sketchers), start with basic shapes (ovals, squares, etc.) and then begin detailing after wards. The sketches can have more life that way . Good job, but you could possibly do more with mapping (not trying to sound mean or anything).
Keaton, I have used shapes and that stuff before, but mainly for drawing animals. I don't usually bother unless it's an animal or a whole body, but I do use them. Thanks for the tips!
oh dang.. the Chaz pic doesnt show anymore.. =_= my bad for not coming on more often i guess.. but yeah.. the Marilyn pic is pretty good dude.. hahah.. made me laugh though.. i havent known anyone to draw him.. mOOooh.. good job as always..