as a kraut i can say that the rollmops is used more in the north of germany... and i have really no idea what's common in the south to be honest.

i have bad hangovers... most the time a shot of vodka and a glass of cold orange juice (or a screwdriver, but that's harder to get down imho) and something really spicy to eat get me down enough to at least work if i have to. :)