Firstly, he's riding goofy, I don't know if you intended that but I find it an odd choice because from my experience more people ride regular, and the fact that he rides goofy obviously makes it so that his back is always towards the viewer. I don't know if you intend this to be for a game but since it's a character sprite, and its animated in a " hey I'm going through a level of somesort " way I'll comment as if it was. With the back being towards the viewer it's an odd connotation as it would be more " game proper" to have his front facing and acknowledging us. As for the animation, as Rox said when he's pushing his body should be directly facing where he's going, which would translate into a straight profile. You also may want him to crouch down even a bit more, as I personally drop down a bit in height when I push to get more power into it and then when I put my foot on I straighten up; I don't know if all skaters do that though :p
