Being able to design your own wall art (portraits) utilizing screen shots. I would like to have some of my favorite locations and in game people hanging on my wall instead of npcs. Perhaps an in game pictograph machine. This is defintely something I could see as an optional service money maker.

Perhaps offer 3/4/5,custom portrait slots per house size with an option to increase with optional services (I would pay for this )

If this isn't an option then perhaps hold a screen shot contest every patch cycle with a specific theme. The winner having their screen capture converted to an in game portrait available via esoterics or something. The current wall art is lacking.