My very own "Improvement Meme"

I'm jumping on a band wagon started by a user on DeviantArt.org called, "Improvement Memes."  You just fill in 4 of your best pieces for each year starting in 2003.  You can then hopefully see a progression from then to now and see how you've improved.  Unfortunately, I feel like mine just shows how lazy I can be...  Regardless, it was pretty interesting to put this together and see how I've progressed.  I haven't improved as much as I'd like to have, but it's never too late to up the momentum.  I'd love to hear your thoughts on the progression my art's gone through.

I wish I could have included professional art, because I think I've done some of my better concept art for projects at work.  Ah well.