The Thing I Really Like About the Cenobites
Something that really stood out about the cenobites, the supposed villains of the film (which truly were Frank and Julia), was the fact that they really didn't come across as evil, per say. They were just gatekeepers, in a sense. Pinhead and the other cenobites simply brought what those who opened the box were looking for, and pursued those who managed to leave Hell.
There was actually a sense of comfort you got with the cenobites, particularly when it came to handling Frank. Yeah, they wanted to bring Kirsty back with them, but to be fair she did open the box. It would have been a violation of the Lament Configuration's rules not to take her along. They came across more as dealers of punishment for those who were asking for it, instead of just sadomasochistic demons. I especially felt that way when they were about to tear Frank apart and Pinhead said to Kirsty, "This is not for your eyes."
By the third film the writers turned Pinhead into a sloppy power-hungry psychopath, but in the first two films (especially the second) it seems like he was governed by certain principles and was willing to listen to reason, which made him more comforting than frightening. The other cenobites however, especially the woman, seemed more vicious.