Yeah this is an awesome pic and I'm glad you have the chance to go back and try it again.
My first thought was along the lines of ... "for some reason I think it would work better as a vertical crop but the whole point of the pic is the converging roads.". I think the vertical crop thought was brought on by the asymetry as pointed out but really I think either would work. My only advice would be to try various compositions: landscape crop with the roads, portrait crop focusing on the building, side shot focusing on the door (slow shutter to blur someone walking out...), I could go on forever.
Nice scene to practice with though.