I really like the base and the overall feel of this mini. I think you're let down a bit by his face which just doesn't look right and detracts from the figure as a whole. Otherwise, a really nice piece IMO.
nice work. you are of to a good start. your highlights could do with being a bit brighter and some of your shading could be darker. it's about good contrast. your blending is good but could be better. (it comes with practice) welcome aboard :)