This is the first time I've ever discussed this subject among anyone, but I never get hangovers either, EVER. I'm French, Scottish and Irish, so go figure.
A few times I should have but didn't:
Anyone drink Orloff Vodka? 10 bucks a gallon. Drank a fifth, a sixer of guinness stout, and a few mikes hard lemonades. Woke up the next morning and was f-ing hungry, but otherwise fine.
Drank a thirty rack and a twelve pack of bud light (ya, i know...) no hangover.
Drank 10 12 oz bottles of apfelwein..... and a bottle of tylenol the next morning.