If i were to grade the films then they would go like this:
Halloween: 10/10
Halloween 2: 8/10
Halloween 3: Never seen it.
Halloween 4: 7/10
Halloween 5: 4/10
Halloween 6: 5/10
Halloween H20: 9/10
Halloween Resurrection (A.K.A. Michael Vs Busta): 3/10
Halloween (2007): 5/10
I've got a soft spot for H20, some say it ripped off the Scream movies, but imo it learned from them and was a better film because of it. Plus i liked the way that we caught up with Laurie 20 years later. It definitely should have ended with Laurie chopping off Michael's head though, that was the perfect ending. Resurrection was a travesty, after the opening 20 minutes it could have been a fan film made by a bunch of A level Media students, not to mention Busta Rhymes going one-on-one with Myers which was laughable, especially when he started shouting at him "Mikey! You stupid mo'f*cka!"...
However, with the exception of 'Resurrection', i can still watch them all if they are on TV, regardless of the actual quality of some of the middle sequels. Afterall, it's Michael Myers slashing up stupid teens! What's not to like, lol. The same goes for the 'Friday the 13th' series, but i feel that the 'Friday the 13th' films get away with having really bad story's because they are still fun to watch as it's more about the inventive kills than plot.