Lovely shot. I wonder if there's an old piano and they play it hot behind the green door. I am singing along now I have seen this photo. I shall sing quietly though because you really don't want to hear my singing.
Unusual doors are always a good subject matter and the three you have done would fall into that interest. I do think you should get the horizontals and verticals absolutely spot on (in camera if you can) but easy to do in post production. Choose the same format, portrait or preferably square because the latter abstracts the image further. Then when you have a big enough collection (anything from 3 - 10 or even 15) make a panel of them all, preferably printing and mounting them. Putting them together makes the narrative much more interesting. Looks like this could be a project! Good luck!
@onewing lol!