I well up in sports movies, those feel-good tales of underdogs persevering and coming to a triumphant and mostly psychological victory:
Again, Field of Dreams
For Love of the Game
Rudy (big time - I think I even shed a tear or two)
Can't think of others.
Whatever age I was when it came out (I think about 8 or 9), I bawled at the end of My Girl. Poor Anna Vadar - I just wanted to give her a big, dirty, groping hug.