Seems like one of those threads that will come up again in a few years so I will give it a shot, but not overly confident with a top 15 off the top of my head:
Rad
Adventures in Babysitting
The Devil's Rejects
Scream
Sister Act II
The Hangover
Saw
Emmet Otter's Jugband Christmas
Party Monster
The Others
Texas Chainsaw Massacre (2003)
Ted
Beavis and Butthead Do America
Goonies
Donnie Darko
I would also love to add Odd Thomas, Inglorious Basterds, and Requiem for a Dream, but, oh well...