These are my current favorites. I keep rewatching them. They just give me chills (in a good way) when I watch them, I'm rather excited to see both of these movies when they finally open. They just seem like really dark, interesting, and unique movies:
Watchmen
http://www.youtube.com/watch?v=E4blSrZvPhU
Repo! Genetic Opera
http://www.youtube.com/watch?v=xETgGym8cnE
Classic Favorite:
Cannibal! The Musical
http://www.youtube.com/watch?v=_HfIbOyUX0U
Just hilarious. I love the "In the tradition of Friday the 13th, Part 2 and Oklahoma..."