Strangely, I don't get very emotional about most movies. However, due to past experiences, the anime film "End of Evangelion" gets to me. It's never made me cry, but it has a very potent effect on me.
The Harry Potter books got to me several times, especially the last one.
Now, this is strange. Whenever I'm reading about, watching, or looking at nearly anything involving animals, happy or sad, I start tearing up. I have no idea what that's all about.