A wonderful find over on the Midjourney discord and I thought I’d share some of the wonderful work by Robomar.
Robomar used the prompt “Woman, (style name)” to create these wonderful examples of what you can expect to receive with a particular style in Midjourney. Style names are provided in the Visual Guide below the image grid, my particular favourite styles are: Halftone, Pop Art, ink drawing, charcoal, film noir.
He has a put in a lot more work in experimenting with styles and keeps releasing on his Instagram account so make sure you follow him there on his Instagram account @robomar.ai.art

Since Robomar released the above Visual Guide, there are more posts added on the Instagram account which I have added below for more fun in Midjourney. Also, these style names can be used with other AI models as well but the results would vary.