Wow I've been away for quite some time. Well, now that I've remembered my password I'm back, and hopefully for awhile. I had taken a hiatus as I was working on illustration jobs (of the non-concept variety tho), so I feel like I need something to help keep me driven to draw what I want more often; a sketchbook thread should do it.
Looking at your old sketchbook and your new I can see an obvious progression.
I agree with your move to start polishing some things up. With the time that you put into sketching you could start filling out a portfollio. If you have the wherewithal to work digitally you should try speedpainting.
Rather than simply colorizing line drawings you might find it refreshing to work purely with color (or grey scale if you rather).
It looks like your work is about ready to take off.
Great linework! You must show more stuff. Painting over the line work is not bad, in fact it's more difficult to jump stright to color. Very solid stuff.
Some of this concepts are really great overall. Perhaps you could develop them further adding more details so that the eye can travel.
You could also add some more environment here and there.
Extremely fun stuff in here, I really like your pencils and inks, and i love the concepts you've thrown in here. Maybe a little time on your figures underlying structure would help iron out some proportion issues, you ever work with gesture figure drawing? Once i got the hang of that it really helped me out.
Of course on the day off I have, the day I was planning on spending time down at the market to draw all the people doing stuff at the park, it rains. Instead I sat facing out the window at the coffee place next to the entrance, to get people as they scurry about trying to dodge the bullets of rain.
Plan on doing some speed painting enviro stuff tonight, should be fun/learning experience.
Pretty interesting what you captured. The face on pencil looks pretty neat, but you have some other stuff that is rather good (lot's of people turning back). The drawing with perspective looks cool too.