Least favorite Halloween items for me were:
1. Religious pamphlets
2. Apples or other non-candy
As far as candy, though I love chocolate and like peanut butter, I don't much care for them in combination, so I have to go against the majority on Reese's and similar candies.
Similarly, though I love chocolate and like at least some nuts, I'm not fond of them in combination, so I'll pass on the various candies with nuts in them.
I can also do without licorice (the black kind that is; I like the red kind fine), butterscotch, and coconut in candy.
Love just about any other kind of candy, including almost all those listed in this thread on both the best and worst lists. Definitely including malted milk balls, one of my favorites.
Sno-caps, caramels, Three Musketeers, Milky Way, Nestle's Crunch, 100 Grand, Necco, Sourpatch, cinnamon bears, basic Hershey's chocolate bar, etc., etc. All terrific. Would eat stuff like that all day if I didn't care about being even fatter than I already am.
How about obscure ones like those candy cigarettes? Anybody old enough to remember those? Those were actually decent.