It is an impossible question but this one for me would tie for the top spot with Orient Express and Three Act Tragedy.

These two are on my favorites list as well :). What I love about Five Little Pigs is the tragic and sadness of this story and the final chapter is amazing. I cannot say anymore here, because it would be spoiler ;)

This one is wayyyy up there for me, too. I'm not sure it edges out Orient Express, but I do love it.