These are really nice Adam!
If i were to be critical I think her face is a little lost compared to the highlight in the background in the first one
I would perhaps up the exposure to bring her face out of shadow a little, this might loose the highlights in the background to clipping but i think that may add to the effect rather than take anything away
The pose in the second is really nice, but i might be tempted to go a bit more gritty with the pp! maybe desaturate and retone with a split tone with a skin tone on the highlights (if you use lightroom) or add a similar tone as a layer in photoshop and adjust the opacity ...
the mono toning is a bit strong for me in the last 2, but i can see where you are going!
hope you dont mind the critique?...
In fact, fudge it ...
this is what i mean (plus a bit more) when talking about the second one ...
I really hope you dont mind??? this is perhaps a little ott, but hopfully demonstrates what i mean about gritty...