i've been studying the greats of photography, and worked my way up to yousuf karsh. he had an amazing style, especially for having been working back in the '40s and '50s.
doing a karsh style image is a pretty big technical challenge. there's a lot of lights in play, and a lot of minute adjustments needed to get just the right angle on everything. the specular reflections on the skin is especially important and difficult to achieve.
but all told it's a very rewarding style. this is only my first attempt, i plan to explore this approach much more thoroughly in the future, it seems to be very rich with possibilities.