One of the best story lines in the history of "General Hospital," second only to the Stone- Robin AIDS arc, is the one airing now during the 55th season of this long enduring and much beloved daytime drama. One of Port Charles' main characters, crime boss and coffee importer (ahem!) Sonny Corinthos, played to perfection by the uber-talented Maurice Benard, is reunited with his father Mike Corbin, portrayed by the bri…