I think it's a bit weird that this guy have a very small shield compared to the axe and the amor he's wearing. I mean, the composition gets a bit weird don't you think? The armor however is really interesting, I like the helmet design a alot.
I would say the ilustration as a whole doesn't seem "polished (take the face as a example)", but I have the feeling this was just a concept, so I'm not good point that.

Anyway, just wanted to say that I think your work is really good. The fact you made over 289 artworks is amazing and I take it as inspiration to my workflow. Congrats!