Engineers of '12

So, I decided to do these every year. And this is the second one I've done. And I'm a senior. And I was supposed to finish this last year. Awesome job, self!
Oh well.

Every year (HA.) I try to draw all of my teachers as engineers from the graphic novel Hollow Fields by Madeleine Rosca (Here's her DA page! [link] She's awesome.) They're all green and stitchy because they keep themselves alive with SCIENCE. And steam power. Which I forgot to add again. Oh well~ And the arrows, I assume, are just for fanciness.

Here's the one I did in '09! Spot the differences! I feel so... improved. C: [link]

This time around, I used a more realistic style to try to make the teachers recognizable as themselves as well as engineers. And because my style's changed that much since '09. Wow. And I payed attention to different aspects of how engineers look this time. They tend to all be green, and their hair is more or less hair colored, usually. I think. Although there are some pretty out-there hairstyles in Hollow Fields.

The coloring seems really disjointed and all over the place because it was done over the course of half a year, and I learned some new things throughout that time. XD Of well, I got to experiment a lot.
Also, it was done with Copic markers as well as colored pencils this time. My favorite combo! Much more vivid and fun.

Hollow Fields and engineers belong to *Clockwork7!
And my teachers belong to themselves, I suppose. u_u

Critiques and suggestions welcome! Thanks!