Nice set. Beautifully sculpted light and a consistent theme with them all.
I cannot believe that I am going to say this but in the fourth I find the cleavage distracting. It pulls my attention away from her face (which I love) and they actually seem a bit at odds with each other. Obviously that is one man's opinion so YMMV.
Really nice series. The composition and lines in the first are great. The second one is my fave though.
#1 works for me, I also find #4 a bit cleavage heavy (never believed I would say that), looks like the bra is compressing her chest a bit
For some reason found the colour of the lips on #3 a bit weird (maybe plain red as per #1 would be better). My 0.02, good job.