Nice confident line work, good blocking, good expressive poses.
With your goal developing a signature drawing style, it's all about perception. What jumped out at you while observing these figures? Go wild with the exaggeration of those elements, knowing that you'll probably (though not necessarily) have to rein it back in for commercial work. Since this is a single image and not a setchbook I can't tell, but if you're shying away from facial features just pound the work on facial basics until you're absolutely sick of them. That'll make it really easy to throw in a few descriptive lines for facial expression -- and will provide a big new area of exploration for your personal style.
With your goal developing a signature drawing style, it's all about perception. What jumped out at you while observing these figures? Go wild with the exaggeration of those elements, knowing that you'll probably (though not necessarily) have to rein it back in for commercial work. Since this is a single image and not a setchbook I can't tell, but if you're shying away from facial features just pound the work on facial basics until you're absolutely sick of them. That'll make it really easy to throw in a few descriptive lines for facial expression -- and will provide a big new area of exploration for your personal style.
Good luck in your quest!