One of the most common omissions in character drawing is a lap (I'm very guilty of it). Think about it - no one's legs attach directly to there torso. There is a triangle shape there. If you could put some suggestion of that in too, that would probably look cool.
Also, his back leg is much longer than his front. The height should be reversed to force perspective a bit, making the longer than the back.
Also, his back leg is much longer than his front. The height should be reversed to force perspective a bit, making the longer than the back.