I really liked how Indy pretty much goes by his real first name in this movie, a subtle and meaningful detail.
Upon my most recent re-watch, I really thought it was interesting how so many characters referred to Indy by his first name. Hell, he pretty much seems to primarily go by his first name in this one. It really highlights how Indy and Henry Sr really rekindled the father and son relationship during the events of Last Crusade.