I just created this to learn the intricacies of using makehuman to simulate an actual human (me) and then decimated it down to create a low-poly self-portrait to use as avatar in various services. Enough with the talk, here it is:
I like it! my advice would be to just make the beard and the eyebrows look the same as the hair, rather than the rough texture. I think that would improve the low poly feel.
Do not make the beard plain black then. Make it brighter