This is pretty awesome, I love how much detail you actually did with it! The lines are great and it's well done!
One thing I noticed is that the arms, chest and abdomen are all small compared to everything else, if you could possibly make those match the head and waist then it'd be even better! ^^
I would love to see my character drawn in this style, it looks simple until you really look at it, which for me is awesome ^^ I love to see the little details