This is tough, because it's not necessarily the best candy like 3 musketeers or maybe twizzlers...
For halloween, and for nostalgia, I always liked that shitty candy corn. But best would have to be something I wouldn't normally get, or that my mom wouldn't let me have....so maybe pixie sticks, smarties or dots.
Maybe for that pure sugar fix, I'll go with the sweet tarts (the ones that came 3 in a small pack).