Hangovers Tied to Genetics

http://vinepair.com/articles/tequila-wasnt-responsible-for-your-hangover-your-dna-was/

A recent study performed on 4000 twins from Australia has shown that your DNA and genetic makeup influence your likelihood of getting a hangover, and the severity of that hangover. These genetic markers are also closely tied to the amount of alcohol your body craves, so now after a heavy night of drinking, just blame your parents.

Drunks more likely to survive injuries

A study from the University of Illinois in Chicago suggests that an intoxicated individual is more likely to survive the same potentially fatal injury that might kill a sober individual. These studies indicate that the same drinks that cause you to be more prone to injury may be protecting you as well. 
"After an injury, if you are intoxicated there seems to be a pretty substantial protective effect," said Lee Friedman, the author of the study and an assistant professor of environmental and occupational health sciences at UIC, in  a statement issued by the school. "The more alcohol you have in your system, the more the protective effect." The study says that there is a correlation between the high blood-alcohol content and the survival chance after a serious injury. It does not exactly pinpoint that alcohol is the root of the solution but there is something happening here. livescience.com