I like them.
Seems like many portraits are made in "portrait" orientation, but I don't mind landscape. Please see below for my opinion.
For #1, I think there's a bit too much negative space around the model. Maybe a tad more contrast?
For #2, I like the black and white conversion, and for the most part, I like the posing. I don't know what it is about his mouth open, but I'm not a fan of it. I'd personally like it if his mouth were closed slightly more (or even completely closed). Perhaps slightly more depth, as well?
For #3, this is my personal opinion, but I'm not a fan of the processing/colors. Maybe add more contrast, as well? Otherwise, I like it. It possibly could have benefited from a reflector to provide additional lighting to his face?
Anyways, I'm just a hobbyist, so I'm sure others will chime in with more advice.
