It might just be due to the method you used to digitize them, but the studio images look a bit light.
You should think about having that little face dude as your avatar/visible in it, then it would be obvious that it’s your signature mark. (and I believe I found him in all but one of the pencil’s. )
The studio drawings were photographed, they were to big to fit in a scanner - A2 paper.
Other images are scanned.
And the smiley dude is in all of them.
In which image you didn’t find the smiley? I can point him out to you.
When I drew my avatar, i didn’t begin to add smileys to my every image.
That’s why it isn’t there. I started doing that ~a year ago
Every new image has him.
Hope to make a new avatar sometime soon…
First off, well done, some of these have a lot of personality and the figures in general are good. You come across as a very patient artist, unlike your patience for Blender presets . If you want crits, keep reading, if not, skip to the next paragraph. You should focus on ears and hands more (welcome to the club), they mostly seem hidden or not up to the detail as the rest. I feel your pain here. Also, use line more productively, not just to outline, as seen here http://img19.imageshack.us/img19/8797/008jfg.jpg but to define form, focusing on the line weight in areas of tension- but don’t overuse line if you can help it, this you seem to know already. I also think you should start to play with some different mediums/and work with color, I’m seriously tempted to paint some of these myself
One thing freaking me out is the smiley face, a friend of mine used to do something eerily similar 15 years ago, weird (not in every image tho).
Thanks for the Crits Jay. Yes about the hands and the ears - you are right… I am having a blast when drawing faces and poses, and i tend to skip around everything else… And yes, I find drawing hands quite difficult for sure…
I know what you mean with “Use line to define form”… That’s one little problem I tried to cure in my drawing for ages… But ill get there. The thing that is stopping me here in those studio drawings is that i used rubber A LOT, so my lines don’t really add up to each other very well… And after rubbing so much and drawing parts over again many times the whole paper used to become really dirty… ehh…
Sadly my drawing class in the University has ended and i won’t go to drawing large A2 images from reference anymore… Unless ofcource i make myself do so, but its really time consuming… maybe at summer… Actually, we had like 3 hours for each drawing (1 hour for each of those portraits) in the studio, so we were even instructed not to overdo the details…
I love the crisp, blocky style you have in some of them, they remind me of the the style you see in a lot of CG movies these days, very similar to something like the Incredibles. I have to agree with (jay) about the ears and hands though, in your most recent post the right hand seems to lack detail and the left hand holding the chicken looks a bit odd… Maybe because it doesn’t really look like there’s a thumb? Great job though, keep it up
Try to play more with light and forms. Use more shadows to make the for go in front. So when you make something in color from them or etc you will have a better contrast and a way to get some mistakes off.
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. If you want crits, keep reading, if not, skip to the next paragraph. You should focus on ears and hands more (welcome to the club), they mostly seem hidden or not up to the detail as the rest. I feel your pain here. Also, use line more productively, not just to outline, as seen here 
