I'm that guy. Seriously. There are only a couple of us out there, but I really enjoyed Halloween III: Season of the Witch. If you don't agree, you can take a hike.
The most substantive argument against this film is the fact that Michael Meyers did not appear and the storyline went in a completely different direction. As a little history, Golan and Globus, who owned the rights to the Halloween franchise, decided to depart from the Michael Meyers goodness because they felt that the slasher theme had become played out. They felt there wasn't much left to do with the sub-genre and would just be another tired 'killer with a knife' film. You have to admit, by 1983 the slasher genre had become repetitive and derivative and other types of -ive words. The Mutilator, the lesser Friday the 13th sequels (until, sadly, Corey Feldman revived it), New Year's Evil, the Silent Night, Deadly Night sequels... the list is endless. Until filmmakers like Wes Craven hit the scene in, the slasher was tired. You can imagine what tirelessly killing co-ed after co-ed would do to one's ambition. It's tiring. And those masks? Stuffy.