Something that never fails to make me cry is when I marathon a series (Be it book, manga, T.V. Series, video games, or animes) if it's one of those that I really grew attached to, I'll cry a bit when it ends. Just because of the fact that I loved something so much is ending causes me to tear up.
Also character deaths in nearly everything. Shit gets me a lot.
In a nutshell, I'm a wuss who cries at nearly everything remotely sad