died Thursday at the age of 82 after battling a series of health issues … which never got in the way of his telling a funny story or two or three.I interviewed Caan several times, both for The Post and for a book project, and I can tell you that he never, ever took himself too seriously, despite (or in spite of?) his place in movie history as iconic, hot-headed tough guy Sonny Corleone, shot up at the tollbooth in “The Godfather.” He insisted that I call him “Jimmy” — none of that “Mr. Caan” nonsense, though I had a tough time calling him anything but.