Very smooth, though I worry on other backgrounds that white aliasing might stick out pretty bad.
For now, focus on the form and anatomical stuff.
What's this guy's purpose? Is he a robot? A ghost? just a regular knightly type?
And what's the personality you want to convey with them, stalwart? distrustworthy? noble?
Consider these and work them into everything from pose to outfit to overall proportions!
And personally I'd say hold off on aliasing stuff for now to focus on design stuff, if you want to do it anyway though ideally you want to do that with the same colors as the color you're aliasing. So, lighter blues with the darker blue, lighter greys with the darker greys, etc etc.