One day, I'd like to have more free space at home, so I can fill it with various forms of art. It always felt uneasy to select any specific painting or other object as "something I'd like to have on my wall for the rest of my life". To make the process easier for me, I'm slowly collecting a list of candidates here:

Caspar David Friedrich - The Sea of Ice
Frits Thaulow - Summer Day
Johan Christian Clausen Dahl - Birch Tree in a Storm (it looked SO MUCH better irl I can't believe it)
Attributed to Hieronymous Francken II - The Cabinet of an Art Lover