Hard lines and human form work well together. No matter how small a person is in an image, we're drawn to it because we're hard wired to notice other humans. Probably an evolutionary thing. I think it's why people see faces in clouds and bits of toast.
I loved the warm tones reflecting off the thin clouds combining with what was left of 'Blue Hour' sky. Below the building is a water feature of jets and fountains and I think the blue streak at the bottom is from one of those just catching a hint of light.
Had to wait quite a while for someone to come to the window, another couple of minutes and the last of the blue would fade, the sky would be black and come back and try again another day.
You have to know how to use the camera but it doesn't make the picture. You are in charge of that...