Really nice! The only way could see it improving is if the clothes had more detail. But it's great anyways!

^_^ he's kinda cute. I like the hair. Might wanna work on his right hand and the proportions of his body. A little more detail would be a great touch. I'm not sure about his pose though. Oh, and give him a stronger chin. Ganbatte nee! ^_^

Very good for a start out sketch I would say make sure his chest comes out more. And also remember that the back kinda has a hunch so instead of the straight line in back make it curve outwards, you might wanna make the arms little longer. Good head!