woah you've been busy, you've got great concepts, but i'd recomend you look for some anatomy books, and look for something that teaches perspective. You've got a lot of potential.
The model looks very clean though there are slight proportional issue's with the shoulder width and such, the map looks good, however, its neither in isometric or a perspective, so as i said, you could work on your perspective/isometric. Its quite nicely painted but it looks a little like the bottom was rushed a little. The best advice i could give you for painting on the computer, is to use larger brushes, small brushes mean you have much more chance of making mistakes and making things look untidy, which you really dont want. Larger brushes give much better stroke economy, i really need to learn how to do it myself, but i do know the theory =P. Keep up the good work, nice to see that you put so much effort into all this =]