Yellowhat's Super Review
Shading Techniques
-Dithering
Clusters
AA
Shading
This is what most people have a hard time with, so do I.
Tibia already has the light source set up for you,
So when you come to the specific shading, you will always have it lighter up at the head and shoulders. Rest should be darker.
Some exception goes to knees, and "tibia" legs and feet. Also hands.
Where your shading doesn't seem quite right is at lower part of arms, abs and at the left side of the body, they all should be slightly darker.
-Dithering
I also realized you tend to reach for a pillow shading wich isn't anything you should go for unless you know what you're doing!
Dithering is the same as a gradient, what you try to achive with your current shading technique.
But with dithering you'll achive more texture and less pillowshades.
Examples of pillowshading vs dither;
Examples of dithering;
Clusters
are basicly pixels that have gone wrong, misplaced and not taken care of.
You don't have much of those, maybe at the left side tumb.
AA
Anti-Aliasing is also a hard part when coming to tibia sprites, since we always use a black outline in our sprites.
Therefor its crucial to have this right. Look at the right side of the head. There is some lines which could improved and make "smoother" which is the meaning of AA. You need to learn this on your own if its a light color that goes better here or a dark color that goes better there.
Hope this helped you my friend and maybe someone else