Since there's a feel good movie thread, it's only natural for this one to come about.
So... Which one are sad to you?
Mine:
My Dog Skip (with Frankie Muniz - reminds me so much of my dog and me and our relationship)
Spirited Away - I watch it, and then I hear the theme song at the end, and I can't help getting teary-eyed, wishing so much that I could go back to being little again. And wishing that my daughter could stay small forever.
Dancer in the Dark (with Bjork & Catherine Deneuve) - Major warning for those who haven't seen it, be prepared. It's not just depressing, but disturbing as well. My sister watched it with me and said she had nightmares and trouble sleeping for a week. ... And had to increase her antidepressant dosage for a bit. You may not find it to be that bad, but for her and me, it was. I've been a fan of Bjork's for a long time and her acting in this movie was amazing - not to mention her singing & the songs.
Secondhand Lions - Just 'cuz
Pan's Labyrinth - It's such a beautiful movie, but I have a meltdown everytime I watch it.