What would you draw, write, or paint on the walls of your house if you could put anything you wanted

I once did this in my dorm room in college - I sketched a huge horse along one wall and then a sketched a small koala bear.

Don't know why I choose those subject matters, but I did.

ancient cave drawings:
http://www.culture.gouv.fr/culture/arcnat/lascaux/en/

I like seascapes with a sand beach and rolling waves.

The shores of Loch Rannoch.