I've just been reading through some of the comments on your images and it seems like you don't mind people colouring your images as long as you get credited. So I took it upon myself to give this Ryu pic a go [link]
How about a Tetsumaki Sennpu Kyaku to follow this up with? I love the movement in this image. The spiral from the fireball really draws your eye. With your permission I'd love to have a go at colouring this. I've only been colouring for a couple of weeks (not including my childhood spent with coloured pencils and felt tip pens).