Ass Pull: The whole "Michael replaced an ambulance worker for himself at the end of H20" revelation at the start. It wasn't exactly a trueAss Pull, since producer Moustapha Akkad had planned the idea to get out of H20's ending ever since they shot it, but even hardcore fans didn't buy it.
It was originally worse; the Michael Myers in H20 wasn't actually Michael, it was an obsessive fan. It may have made more sense, but it would've been a very hard twist to defend.
Par for the course for Akkad, who signed off on the ending of 4 with Jamie taking over as the killer in the series, but had no intention of following up on it.
Alternative Character Interpretation: Michael Myers wasn't in the whole movie. He was there during the opening scene where he killed Laurie but the rest of the movie involved the serial killer fanatic that Myers encountered in the opening movie took his place, while the real Myers is just hiding somewhere. After he killed Laurie him passing the knife to that fanatic could be seen as his way of saying "I'm retired".
Which makes very little sense considering the very obvious physical differences in both height and weight between the two.
Ensemble Darkhorse: Jim tends to be fairly well liked, primarily due to his funny one-liners and style
Brad Loree as Michael Myers is also praised by many fans, claiming how he harkened back to Nick Castle from the original film with his performance.
Freddie, Busta Rhymes' character. Rappers usually get a pass for letting their massive egos run wild on these kinds of flicks because it's impossible to ruin a movie when it's already bad to start with, but using kung fu to lay the beatdown on a legendary and unkillable Implacable Man like Michael Myers was definitely a bridge too damned far.
Sequelitis: This is an almost unanimously reviled film, often ranked as the worst in the series. It's also seen as completely unnecessary, given that the ending to H20 neatly wrapped things up and the writers had to go to extreme measures to retcon Michael's death.
Took the Bad Film Seriously: As stated above, Brad Loree's performance as Michael Myers is considered by a large amount of fans to be the sole good thing in what is universally agreed on to be the worst entry in the franchise. To this day, some fans still hope that he gets a second chance to play the character in a much better Halloween film.