First off, its not just the face, but also the coregraghy as well. Michael has this almost robotic movement which shows he's possed by something concluding he is just the shape. (well for the original Halloween's) Jason was simular but more human than Michael.
It isn't too hard to get a pale blank face like Pinhead. I know Doug plays the part so well but what I was trying to say is, its possibly to find someone else who can do a good job playing Pinhead.
As for Leatherface-
Everyone who played Leatherface did a great job except for the man that played him in part3. Maby it was just the look of Leatherface.. Something threw me off though. It was just too obvous that he was trying to be menacing and scary. I never got the feeling, "oh my god, that lunitic is going to slaughter them with that saw!" instead I got, "He tries too hard." Next Generation or Part 4 has Robert Jacks (RIP) who plays Leatherface in a very angry maniac angle - more like the original's but just done more therally. People may not agree about Bill Johnson's work (part2) because of the script.. How Leatherface gets into silly personal sitautions in the movie - if they didn't have those moments it would be clearer that Bill protrays Leatherface exellenty. You got that he was a demented retarded creep with a chainsaw which Leatherface really was acording to The Texas Chainsaw Massacre's director, Tobe Hooper.
