^it happens to everyone man. beer gives me a gnarly hangover. whiskey gives me 0 hangover. vodka gives me a little hangover, wine gives me a hangover that i can tolerate. gin and rum give me a hangover but none of them are as bad as beer hangovers. EDIT: except for tequila.
also, my roommates and i have had this discussion before, and all of us noticed that the beer hangover was a gradual thing, and that before, beer didn't give any hangovers, and now, a single beer before bed can induce a (light) hangover.
i've also asked my cousin, my mother, and my grandfather, and they all gave me the same answer; "happens to everyone once they've drinking beer for a while."