... it feels really good that I'm starting to get paid more frequently to photograph beautiful men like this guy rather than testing for free.
Good for you! Nothing wrong with getting paid for doing what you love!
It's fantastic that you chose to use natural light for these images - not only do they look natural, but it also makes it possible to focus more on the interaction with the talent and less on the lighting equipment and setup...
About the images, I prefer the first one for a couple of reasons. The black and white seems to go well with the dramatic lighting; also, the pose and setting seem more natural. My preference would be for the model to not have eye contact with the camera, so as to make the image be more of a candid moment.
I have a bit of trouble with the second image, if you don't mind my being frank. First, someone with underwear on in a tub with no water feels immediately contrived and posed. Hard for me to pay attention to the underwear when my brain is trying to figure out why this guy is doing that

Second, shooting straight up his genitals and having a rather inviting expression on the model's face moves the image a bit away from fashion and more into male glamour.
For a fashion shoot it makes sense to decide upfront whether you want to pretend to not be there, or have a direct engagement with the talent. I personally prefer fashion images that pretend to be candid shots, so as to allow the viewer to be a voyeur of someone else's good looking clothes. As soon as there is eye connection between the viewer and the model the focus can quickly shift from observing the clothes to engaging emotionally with the model. Which may or may not work for the clothing designer. Just a thought.