Master Chief (realistic)

This was just a request from my Halo fanatic friend! But he's cool. I had my friend, Lance, in a couple of my school classes last year and this year I don't. So I guess he can't ask for anymore requests. It's been a whole year since I gave this picture away to him, and recently I was informed that he still has it. So thank God for that, Master Chief takes a long time to draw. For this project, Master Chief was kind of difficult. I'm more of a human form artist but it was fun trying something new. It was my first halo 2 drawing. what do you think?