I am the same way. I tend to laugh at really inappropriate things, even things that, after what I have been through, people would think I wouldn't laugh at.
Over the top Slasher Movies make me laugh. Darwin awards make me giggle horribly.
Gore Stuff
Rick and Morty, especially this scene below, is hilarious. I laughed so hard in this episode (especially 1:17 to 2:15:
That just twisted sadistic horribleness of the ship makes me giggle.