Hi, SteveZ.. welcome to GG.
I think your first image is seriously hot! The direct contact of her eyes to the viewer is definitely an advantage in glamour... her costuming.. out of focus background.. all bring the viewer's eyes right to hers. The only minor gripes would be that the image appears to be a bit cool in the shadows... I think it would be better if it was a bit warmer... and her left hand seems to have been traumatized, missing a finger and the thumb. Showing all of her hand, gracefully, would have helped that little nit-picking point.
The second image... I think someone else said it better.. toss it. It might have been OK if her eyes were open and looking at the viewer... (can you tell I'm big on eyes?) and warmed up a bunch. A bit of powder would help the shadow in the pits.
Number 3 is very nice, as well. Good contrasting colors which compliment her skin tone. Is this one color balanced differently than #1?
Number 4... doesn't have a glamour "feel" to me... more like a stage actor's headshot, I think. The makeup is a bit somber.. her expression.. I don't know... not sensual.. not even happy... that make sense?
You're off to a good start! Hope you have the best of success.. being in the Toronto area you certainly have a lot of local talent to draw from!
Here's my cowgirl, without the bale of hay!