These are terrific - such expression in your cross-hatching. My favs are the bottom two.
And where, pray tell, are the "not so good"? I think you forgot to post them! Excellent drawings as always.
I love 'em! I don't know if I told you, but you're AWESOME.
I prefer your work, but this (http://www.thedesigncubicle.com/wp-content/uploads/2009/12/6a00d8341ca70953ef012876385ea7970c-500wi.jpg) made me think of it. Best wishes!
Very cool sketches! Who did those?