While I was exploring the internet, I stumbled across this interesting read found on the 'Canada Council for the Arts' website, which describes in percentages the way Canadians engage in the arts.
We have a decent sized wall in my house and I was having trouble deciding which painting to hang... they all seemed to get 'lost' on the wall. I had placed these two paintings on the floor up against the wall and realized they should be hung together. After a unanimous two thumbs up from the members of my household, the paintings were hung.
Art doesn't always have to be hung individually on a wall, you can group them together and have it look great.