1st photo looks great.
2nd looks a bit bright on the face – lighting flattens the face a little bit too much!
3rd facial expression doesn’t do it for me but technically good. Expression seems to have brought out frown lines. Tiny bit too much light to the right hand side of the face but lighting to back and shoulders seems more like it.
4th looks nice but again lighting seems a tad strong. Are you using a silver reflector? Lighting just seems a tiny bit unnatural? There’s just a certain type of glow off it (but could be my monitor – same thing is wha I think is what I’m getting at in pics 2 & 3).
Yup I know what you mean by repetitive, just trying to make sure I get this right before moving on to trying something else. “jack of all trades…etc etc”