For those who know Mechs the way I normally draw him, he almost always has a frown. I feel it's time I explain this since I posted a pic of him smiling without his robotics (link here->https://inkbunny.net/s/1832416)
So, the main reason he is normally frowning and such is because of the following 1) That was how I originally drew him as frowning was about the expression I knew (mostly still know) how to draw 2) I thought it suited him mostly until I started working on him more, and trying to give him more personality 3) The robotics make it difficult on his non-robotic side to move (until he gets use to them and a few upgrades) without causing slight discomfort. This makes it to where, when he smiles, you know it's more impactful