Butterfingers for sure, although I really like Reese's Crispy and Crunchy bars but I can never find them. Mr Goodbar and Crunch are also good.

I'm one of the weirdos who never liked the holy trinity of Snickers/Milky Way/Twix that seemed to dominate Halloween in my neighborhood as a kid. And same with Three Musketeers. I am oddly picky.