I'm a big baby, and tear up at everything, but a few have made me full out BAWL.
Fullmetal Alchemist when...well, you know.
Naruto at Hokage's funeral and when Chouji 'dies'. ;-;
I was crying almost throughout the whole last episode of Ouran, not sure why, it wasn't too terribly sad; I guess I just didn't want it to end.
On a video game note: I cried when Aerith died. D: