Like a good opera, the house at 918 S. Aiken Ave. in Shadyside is dramatic, engaging and waiting for the right person to fall in love with it. Christopher Hahn, who is retiring as Pittsburgh Opera's executive director, and his husband, Ron Booth, former owner of Studio Booth, have listed their 3,537-square-foot home for $1.8 million (MLS No. 1741691) with Stephanie Veenis of Howard Hanna Real Estate Services (howardhanna.com or 412-963-6300).