The low key one is defintely my favourite and IMO by far the best or the three. Can’t really fault it. Great expression, Nice big soft light and the BW conversion is easy on the eye.
The second is nice too. Pity he’s not engaging the camera. I’d like to see his skin tone just a tad darker. But that’s just personal preference. His skin is not bleeding into the bg so i guess it’s technically correct. :)
Nice effects in the third. Good work with the glasses. Masking the hair is a pain. You did OK there. The third would work better if the boy and horizon were at the same relative angle. The horizon looks like it could be sloping a wee bit more.