A subject may yield many different outcomes depending on the composition/angle. Heck, you can even make a pretty gal appear masculine through angles or really beautiful (trust me, I've tried it!). So big part would be angles.
with regard to the foreground, its my experience that for wide angle shot, if there is some element in the FG, the pic will look more balanced. else, kind of empty and lopsided.
since it was laying concrete (i suppose), the archs were very narrow. then everything came to a standstill for 30 min. i waited, jus to see wats next. then it happened, the operator was knocking off. and the crane swung 180 degree to its resting place.
its a lucky shot.
only one chance, and the arc didnt go out of the pic.
what I'm trying tell people is that a photo without content, regardless how much effect a photographer put in to make it technically perfect, it is still worthless.
just like a pile of crap, even the photographer shoot it with a Linhof 8x10 view camera, Kodak finest grain Ektachrome pro film, schneider lens, with nice mood lighting set up using broncolor flash, printed on wall mural size print, it is still a photo of crap.