Wow, Meghan these are fantastic portraits. Great work and thanks for sharing.
I really like the soft light, but with dramatic shadows. The skin tones are so natural. I've found soft lighting to be the hardest part about lighting studio portraits. I'm curious what your setup is. How big and what is the placement of your softboxes?
Have you considered adding light from behind so that hair stands out from the background? But that might not be the look you're going for.