I don't have a favorite midnight snack in particular, usually what I eat will depend on my mood~
Cookies or something sweet, just taking a bite out of a block of cheese, cream cheese and crackers, leftovers...
And sometimes I make an abomination of a snack that can satisfy my silly cravings (weirdest one I've made was a small sandwich of oreos, cheese, ketchup chips, peanut butter and avocado, it was good~)