Wall Art

We've been in our current home for nearly a year and have decided that it's time to start adding some art work to the walls. Some people seem to effortlessly add and subtract art work from their homes, but we are more prone to talking about it for ages. It seems the thing to do is to simply begin, but in the back of my mind I'm wondering whether to look for large, statement pieces or smaller pieces that can be hung together. Which do you prefer?

photos via vintage simple, yvestown