When shooting portraits, I sometimes find that I prefer the landscape version to the classic portrait version. Of course, it depends on many factors, so there are no hard and fast rules. Maybe I like it because the landscape version can allow for more of an environmental portrait, showing the individual and the environs. The vertical shot singles out the subject more, and often that’s what you’re aiming for.
But, no matter which one you like best, we can probably agree that it’s almost always a good idea to experiment and try different ways of shooting the same thing! And in this case, it’s a very handsome — and considerate — young man!