Okay, so I drew a few today and I think I'm doing okay on faces and hair, but basically anything below the neck doesn't seem to look right to me. Any suggestions?

It's Kai Hiwatari from Beyblade. It looks a little better now that I've smoothed it out a bit in Photoshop. He has some random spikes coming from the base of his skull as well, that I can't seem to get right (I erased them for now).