I always wonder about the 'good alcohol won't leave you hung over' theory.

I mean, if I'm drinking a Jack and Coke or a Jameson Rocks I'm probably at a concert or a dive bar, staying up late and having one too many drinks. Whereas if I'm drinking a high-end single-malt neat I'm probably at an upscale bar and I'm apt to maybe opt-out of that one last drink.

Additionally, a lot of people have bad memories of low end alcohols from college, when they're doing shots of cuervo, popov, or other low end alcohols in excess. Vodka, in particular, has very little differentiation between brands (it's pure grain alcohol). I'd really love to see a controlled study where a group of people drink a high-end and a low-end vodka and describe their hangovers the next day.