My heart goes with A New Hope, but just as one movie... ET is one of the greatest movies of all time, one of those movies that still steals your heart as an adult as it did as a child. I don't know anyone who doesn't get mistyeyed at the end when Elliott and E.T. say goodbye when the spaceship comes back (oops, I spoiled a movie from 1982 that everyone of a certain age has seen? sorry lol)
Also love The Sound Of Music.