Hi
I was always faced with the same question when I used to shoot press pictures, but it was more down to eventual usage than aesthetic choice. We mostly shot landscape format as this is what 90% Newspapers wanted for feature stories.
Most mags too for inside features, double pages etc... But if it was a story of magazine cover importance, we's shoot a few uprights too, as who wouldn't like to see their shot on a magazine cover.
Also on news/sports stories where you had to shoot fast it was just far easier to shoot landscape as the ergonomics and balance of the camera as well as one natural field of view were all far better.
Lovely landscapes by the way Gary... Must asmit I'm always impressed by your work!! I think they both look good.
cheers
Gareth