looks very cool to me!

my sugestions would be those, but in a very subtle way:
head is a very, very little to big compared to the legs -
compared to the body the head seems pretty much ok.
allthough he shouldn´t look bulky his legs appear somehow thin,
in addition I would make them a bit longer, cause with this length
they kind of look like legs from a child.
but thats all a matter of taste. what I would do is to
bloat his calves and wrist a tiny bit

nevertheless dude - your model rocks! like it very much!