We can't solicit for commissions in this forum, you should remove that. On to the critique.
For the most part, you have good control on anatomy, where you struggle is with posing and adding energy to those poses. The boxing image is where that struggle is most prevalent. The motion lines should be on the bearded boxer's arm not only on the glove, and the lines should be following behind the arm. there is a stiffness in the bearded boxer's pose, like he stood still and punched the other guy instead of leaning into the motion. The other boxer is fine except, while I'm sure foreshortening would make it harder to see some body parts, some of his body should be visible like his other leg and some of his back. It feels like you been looking at a lot of references and ding anatomy studies, all of which is good. I think the next thing for you to practice is movement and energy. This can improved with timed gesture drawing, where you goal is to quickly sketch down the form of a person rather than to capture all the details.
Another point of practice could your faces and heads. Some of the faces look fine, others look uncanny. Practice drawing structured faces from different angles. Branch out and draw more different hair types; I'm seeing a lot of short, straight hair and not a lot of longer, curly hair.
And lastly, draw women! It doesn't hurt to try, and if you do plan on doing commissions, eventually someone is going to ask you to draw a lady. So gesture, faces and heads, and women are things I feel you should practice more on.