I truly think Halloween III: Season of the Witch is good movie. The accents, yeah, weird...but did you see those kids turn into just piles of bugs? The theme song, the plot, the bug piles, it's just great. I'm a big horror fan though, so there are things that I forgive in a movie that perhaps others don't. Bad acting & gratuitous anything, for example.
I also enjoy Sleepaway Camp, but I'm willing to admit that it isn't actually all that good up until the last 2 minutes. The big reveal makes it all worth it, though!
I also really love the Devil's Advocate, Keanu not-withstanding. It's just super dark for a major Hollywood picture & yeah, I think Pacino makes a great devil.