Slaughterhouse definitely has some issues, such as the black comedic influence, but it's a generally solid movie overall, and though far from perfect, the movie has charm, as far as late 1980's slashers are concerned.
What's your favorite song by Mortician, and if it's not "Chainsaw Dismemberment," why not?
(http://www.fight-evil.com/movies/years/1987/565-3.jpg)