ET and A.I. are the highest rated for me. Two of the most emotionally resonant films I've ever seen. Very beautiful films that are even difficult to put into words.
Then there is Close Encounters of the Third Kind. Another amazing piece. I also love Catch Me If You can, all of the Indy films, Hook, Jaws, Jurassic Park, and The Terminal.
To be honest, I have little to no interest in Spielberg's "Oscar films," Munich, Schindler's List, Saving Private Ryan... they just don't interest me, I don't like War films.