You're doing great. Love your lighting. No need to make the model face the light in the first shot. The lighting is interesting and not typical of "average" portraits, but you don't take "average" portraits, do you? You do great fashion photos, and you do much, much, much better than average or typical. Centered in the frame is great in the first shot as well, and it puts good focus on both he and the clothing. The expression and posture are also great. The points in the post above mine are valid, but in my opinion not valid for your photographs. Keep doing backlight when you feel it's necessary, as you have in the first shot (and it looks great). Continue posing men with brooding posture and expressions, it's very flattering for men's fashion portraits, especially in the editorial style that you capture them in. It’s clear to me that having him smile in these shots would look very out of place from the overall mood captured in these shots. I also really love the depth created by the corn leaves at different distances from the lens.
Perhaps one detail to consider in the first shot is the one dark corn leaf that cuts horizontally across the jacket. It interferes with the flow of composition, in my opinion, but it's a matter of taste.
How do you find your models? Do you go to agents? The best feedback I've ever gotten was from modeling agents, and other photographers who do model, fashion and editorial photography. If there's an agency near where you live or in a city nearby, see if you could set up a meeting and have them go over your portfolio; usually they are very willing to give you honest, helpful and relevant critique, especially if you want to test with their models. From the looks of your work, agencies should be dieing to get their models in front of your camera to test with you. Look up the agencies, email them, set up some tests and possibly a portfolio review.
My honest opinion is that you need to be getting feedback from a model agency or a very very select few photographers that you look up to, not here. Please don't allow anyone ^^here^^ to get in your head and sterilize your talent or style. You do great fashion/ editorial style portraits, keep doing what you're doing.