@krissThe hand of the arm is like a knight's gauntlet, the lower arm is designed like an engine part with some ventilation slots and the upper part like stylized anatomy.
The designs you brought up are nonetheless the imagination people have of steampunk, but I rather want to go with my own solid and more minimalistic approach and keep the sensitive mechanics inside the chassis.
The gauntlet form is also a small hint to the "sir" knight.
@vermoliusThanks for mentioning, I applied it.
@wolfenoctisThanks for your thoughts, also thought about some things, maybe I will come back to it later on
@alcopopstarI wanted to achieve a reserved and supervising mood for him. For me it was rather more important to build up an eye contact with the viewer instead of distracting from that with a very dynamic and explanative comic-book pose.
The idea behind it was that you should look in his face where he don't reveals anything, while the clothing gives hints and that should create some kind of true-to-life tension which I prefer much more for this charakter than an exaggerated exhibition of mood. Although I dunno if it works how I imagined. But I won't majorly rework the pose aside from details.
@helmThanks for your observations.
I thought about the proportions and shortened the legs a lot. I think it's now more appropriate than before but still looking enough anime like. One observation I made is that most animes use very long legs and big hands - Although I don't have a concrete idea so far what's exactly behind this proportion choice.
The point with the chin-shadow is valid, although black felt too much and destroyed the form - I darkened it a bit that it recedes more.
I removed all the folding sof the boots, since as you mentioned it I also thought that would distract a lot and it's too much detail in the wrong spot - it hurted more than it helped. I also reworked the trousers once more, although I am still not too confident about them.
The design choice I am struggling with is if I should leave the length of the boots as they are or if I should let them end beneth the knee - although I fear this might hurt the verticality of the design so I am unsure.
For the first attempt I don't referenced, now I searched some pics of first worldwar soldiers:
The boots (if they have one) also end below their knees, so this might be a more intelligent solution.

the new version:
-adjusted the proportions of the legs
-adjusted the hips
-changed the shoulder line
-simplified the boots
-changed the drapery of the pants
-gave the chassis of the lower arm a tilt
-added some holes in the belt
-modified the collar of the coat
-modified the length of both lower parts of the coat (they were really different before)
