Oh!!! Debiraymond!! Overboard. I LOVE that movie! Totally forgot about it. I have watched that a whole bunch of times. Love it, love it, love it. Such a feel good movie.
#1 for me is Field of Dreams, because it makes me believe in magic.
But some close runners up are Love Actually, The Dark Crystal, Shawshank Redemption, and Bridget Jones' Diary. Oh, and Water World.