Among the first original horror films to be "raped in the sequels". Others included in this group were Friday the 13th and Nightmare on Elm Street. Horror movies shouldn't have afters. I feel if it would have been left be, I would still be worried about where Michael Myers went after being shot out of the window.
That said, this is one of the best. John Carpenter at his best, I believe. It is a simple story of the boogeyman and the good girl that has played in horror movies before and after, but Carpenter told the tale in a real way that so many moviegoers could relate to even to this date. Babysitters were depended on then in 1978 and still today to care and protect children when their parents are away no matter if it is a neighborhood girl/boy or a "sister". But what if, what if - the boogeyman showed up?! And in the beginning of the movie... what if the boogeyman was your brother?! Simple, scary & memorable music, plain dialogue and scenes that delivered and still do.
Michael Myers is a scary fellow, but not only him - you can't think of the movie without thinking of the two strong performances of Jamie Lee Curtis and Donald Pleasance. Without them, I don't believe the movie would have held together and been such a great movie after so many years. It just ain't October Horror Movies without a viewing of the original Halloween.