Shading, the eternal struggle. Not too unsatisfied with this though.
Holy shit... this actually reminds me of me and my fiance... weird! And awesome. I mean... he's not a centaur but their body types are like ours. Give the plugs to the centaur dude; make him a red/brown haired.. Bam. Guess I just need some tattoo sleeves. XD
Seriously though, this is very, very cute!
Link
Concoction
Holy cow it's even better in colour.