To colour it, open this image, make a new layer under it, make this pictures/layers mode onto Multiply, colour on the layer under it. Works in SAI, Gimp, Photoshop, Manga Studio, Corel Painter, Art Rage, Fire Alpaca, Sketchbook Pro, ect.
I like him! He's a little light, but probably nothing that a little bit of photo-editing can't fix. And I like your style/his expression. I'll be sure to color him soon.
