even though they have the reputation of being for ******* (which they kind of are), alcohols that you can see through like gin or vodka tend to have less sugar and other ****, kind of like when you get bunk *** tweaker weed with a bunch of seeds and sticks and **** -- it'll still get you high but make both your head hurt and your stomach churn. its also about in the proof as well; the higher the proof, the lower the concentration of other noxious ****, which again in turn results in less of a hangover. the biggest benefit though is the fact that one could pour vodka in about anything without anybody noticing, back in 8th grade i would put it in a bottle and drink it straight, telling my teachers it was water...
to sum it up:
clearer alcohols = decreased hangover
darker acohols = worse hangover
deez nuts = best nuts