his head looks good,but there are a few things that you should work on(also for your future models)
.If you would animate the shouldres or legs,they wouldn't deform to good.So add some more poly's to them.
Second thing is the use of polygon's.you don't need all those polygons on his mouth and eyes,especially not if you're not even sure if it will be animated.
take onother look at your reference for his head,cause his hair that covers his ears,isn't that big in the sideview.
His pants also don't need that much poly's for something that looks like a cylinder.
Last thing i want to say is the hands. No offence,but they are kinda terrible. Real hands don't look that fat and flat,look at your own hands and study them.
I'm sure it will look great once it's textured and posed by Nataku,but some parts could be improved.