Concept Art Day 1

I've spent 2 weeks working on fantasy characters concept art. I made 9 of them making one for more or less a day, but 5 concepts I consider as a failure, so I wont post them, even if this is a sketchbook :)
Remaining 4 could be better but I feel like I'm moving in right direction with them.

My friend Noiprox helped me a lot with this week works, I owe him alot! No, really, A LOT! He helped me too enhance my work-flow and way of thinking about design. I still have a lot of work to improve my art, but thanks to him I'm on right track now. Thank you!

From the oldest. This one I made last Monday, this one changed my way of working and thinking.

I will not show Tuesday one, it was step back :/.

Here is Wednesday, getting back on track but I messed up values a bit :)

Saturday, next progress, better values, and more realistic forms.

Sunday, this one is my favorite form this week, the best values, and details, but design and forms still could be better.

Gimp 2.7.4-git