I'm not that familiar with your characters, but I feel like this one has some stuff going for it.

I will however point out a few issues:
- The left arm (on the right is mostly drawn from the said, but the corresponding hand is drawn as if it was directed "at the viewer". With how the arm is directed, it likely should have been drawn more at a side-ward angle.
- The neck area looks a bit thin, while comparably, the length between the start of the parts of the chest being covered up by the t-shirt are very long. It looks as if the collar of the t-shirt was reaching halfway through both shoulders.

Other than that, I don't have any other complaints. It's a solid picture overall. Well done

Okay, the arm is a legit mistake, thanks for pointing that out.

The neck bit... that is partially due to me needing to work on the jacket shoulders, which were meant to be thick and raised, alongside the fact that his neck is meant to be that size.