Oh man, those coworkers are the worst kind. Luckily, I haven't had to spend a lot of time with any of them, but all they do is whine and complain about how everything in their body hurts and it's just annoying.
And sure!
The coat looks a bit off. Around the neck, you can see the shaded part underneath. It gives the jacket the effect as if there's a fan underneath Ampharos that's blowing out his clothes. Just let the clothes relax on his shoulders, and you should be fine.
As for shading, you did a pretty good job on that, but you're missing the part underneath his belly. You get the shading in the white area, but not in the yellow parts. Also, you might want to consider shading his face a bit more, as it currently looks really flat, and Ampharos has a more elongated face. Of course, the angle contributes to that problem, and shading alone might not fix it, so you might want to look at other examples to see how they pull it off.
Overall, I'd say this is a real improvement. In your earlier works, your coloring was all over the place, and the unevenness of the strokes really came through. Here, you did a very nice job of keeping consistent. The features that should look the same (eyes, ears, etc) are really good as well. Everything is in proportion, and the character looks more comfortable. The shading is almost there, so just keep trying at it. I must say that this is quite the step up from some of your earlier works!