Not sure which I fall into - maybe both

but I very rarely get a hangover (yes this does encourage/ allow school night drinking - inc now)

I have to drink either red wine or over 8 (uk - 568ml) pints of 5%abv lager to start to get fraction of a hangover the next day (starting at a slight thick head level)

incedently for me, eating stuff with sugar and alchol = major acid reflux this took ages to figure out why sometime I was throwing up in the middle of the night (no other symtoms)

another thing that is fairly obivious to me now is how proportional the effect is of the amount of food eaten before drinking and the speed of which you get drunk. This can be used to great effect for big drinking days (eg stag do)

I could easily drink all day comsuming > 15 (uk - 568ml, 5% abv) pints if I keep a level of food in my stomache