I live in a big building, and every year I buy a few bags of candy for the snot nosed trick or treaters. Of course, I sample a few, myself. So, I'm fairly well-versed in this topic.
Personally, I don't like sticky, chewy, or hard candies like Skittles, Starburst or Lollipops of any kind.
Chocolate based is the way to go.
This pic is pretty much the candy Hall of Fame:
My Top Six
1. Snickers
2. Hershey's Chocolate Bar
3. Reese's Peanut Butter Cup
4. M&Ms (I prefer the Peanuts)
5. Almond Joy
6. Kit Kat