We collected stuff for years before getting around to framing and hanging. We have:
Den - a few banksy prints on wood and a painting by my kid sister
Living/Dining - A painting of the cliffs and ocean I bought from a local artist in American Samoa, our wedding vows (signed by all of our guests), this map of dc neighborhoods
http://orkposters.com/dc.html , a framed colin winterbottom photo (one of these
http://www.colinwinterbottom.com/gallery.php?gallery=3), a framed painting by a local artist from South Amerca and a map we paint ourselves to indicate the states we have visited (we have a goal of all 50 and are almost there).
Entryway - a few small painted cards in frames from local artists in Taos
We like collecting local art when we travel or live abroad!
Bedroom - a few of our wedding photos