OK, let's say you're in my class, so first we build you up then tear you down <g> - here goes:
*Lighting on subject looks good, even. Darker skins tones are difficult to light evenly so good job there.
*Posing/wardrobe looks good - mesh pattern on shirt accentuates musculature on arns and creates good cut-in lines, good definition. Like the hand on shoulder to flex muscles and add a bit of interest to pose. Good facial expression - mischevious smirk?
*Camera looks to be at subject shoulder height to look straight into the eyes - good; focus looks good with a bit of softness to the face but well-defined lines in the top's fabric.
*(Highly subjective comment)Bottom third of subject is a bit dark which could go two ways - de-emphasis of lower parts forces eyes to top and face, or makes image appear unnatural.
All-in-all the photography looks very good; looks like your post may need a bit of tweaking:
*The bright glow around black oval is distracting; would prefer the blue-white swirls throughout (my bias is to use subdued backgrounds for portraiture.).
*Looks like the subject is only using 1/3 of the total image area-perhaps enlarge the subject while moving to the left & up to make the subject fill the majority of image area and move right eye to the lower right vertext of the top left rectangle (divide image into a 3x4 set of rectangles).
*The subject is posed so that it is clear there is a floor; but with this background the subject appears to float which screams "computer-enhanced". The background should reflect this, make a line or alter shading to create a definite border between a "wall" and "floor" to give the subject something upon which to kneel.
*Not sure about the cut-off of left hand and lower leg/foot.
It would also help to know the intended audience for the shot - 8x10 for a dance troupe application (i.e., subject-oriented) or as an item for a portfolio demonstrating portaiture (i.e., photographer-oriented).
HTH.
---Ritch