Love Alex Mercer. :D The white shirt is reading like a beard to me for some reason. Maybe if you tilt his face towards us more that would help. I think you could go with slightly darker and more saturated colors since he's such an intense and dark character himself.
The nose could come down a little and the chin could protrude a little more, also.
I can kind of see the beard angle, now that you mention it. With the face I was trying to keep it nondescript and just more of a profile thing but I dunno, maybe I can play around with it, this is one of the first pixel pieces I've done with this much detail. And with the palette, I was going for kind of a lighter look so that all the details didn't just get lost in darkness and this palette just kind of spoke to me, I dunno.
Thanks for the advice though. :D