When I was a kid, the ending to ET use to make me cry, I watched it again recently and not so much anymore.
Since I was a kid I haven't cried watching movies or TV shows but I have come close:
Spock’s death and funeral at the end of Star Trek II The Wrath of Khan, is one. The whole end of Lord of the Rings the Return of the King, is another. And Schindler's list.