Foods/drinks you can't get enough of, even though you know they're rotting your guts?
Mine is soda/fizzy pop. Especially Coca Cola. It's sooooo bad for you but damn I love an icy cold glass of it! I love diet cola too, which I actually drink more of these days, but it's equally bad.
I used to be terrible for chocolate - I mean I kind of still am, but it's more baked goods now. Like muffins, brownies, cakes, biscuits.
I swear I'm like.. so close to diabetes. So close. But I can't stop!