Cyborg Squad

I drew this guy during a physics course back in high school (I had to use GIMP to erase the notes about atomic orbitals). Obviously Shirow was my hero at the time.
I recently decided to scan a photocopy and give it some colour. I know, it's not finished, but hey, I'm doing a masters and my rate of submission is so slow that I thought I might as well start sharing now and take suggestions on the way. So suggestions, please, I'm terrible with colours...
If you think I'm too slow or plainly don't like it, give me a graphic tablet and I'll submit something once a week!