not knowing much about john henry [i haven’t read the extra info you provided],
but from the info you provided in your initial post I’d say he needs a shirt with rolled up sleeves to endorse his ‘can do type of guy’ nature
also i think his abdomen are stretching a bit to long.
the pants could use a little bit more definition, currently they feel rather volumunous, more like baggy sweatpants then, what I’d assume a steel worker would wear, Jeans.
also, and this is harder to tell since your last shots don’t include wireframes, he could use more loops around his mouth, his upperlip is stretching it.
sorry if this comes of as harsh, just thought you might appreciate some crits.
cool character tho, I have a thing for hammers.