Leading self-storage real estate investment trust Public Storage (NYSE: PSA) may not seem like the most exciting stock to you, and that’s understandable. After all, what business is less interesting than warehouse-like buildings where people lock up their extra stuff? However, the returns generated by this self-storage giant have been anything but boring over the past several decades. And after a 14% drop in the share price over the past year, now might be a great time to add it to your portfolio.