Just a few of my favorite images of kitchen open shelving. I found both of these at Remodelista's great open shelf roundup a while back.
I prefer open shelving for the ease of use (who hasn't been clocked in the head by an upper cabinet?) and the ability to see my collections of dinner and cookware, but I know many would prefer to have their clutter hidden away and worry about exposed items accumulating dust. Tracy mentioned in the comments that, living in California, she worries about earthquakes. I had not thought of that!