O+. One pesky little protein marker (they are protein markers right? Am I mis-remembering my rudimentary biology education?) from being the universal donor. Drats. Welp, at least I can still help a good few people yeah? Might even be able to help with some of those 'special match' things they do for the more obscure blood types you find in some minority groups because of my mixed ancestry, but I haven't checked that bit in particular. Do you have to do a special request or fill a form for them to check that?
I'm also one of those lucky bastards who's naturally pretty damn big (just under 6 ft tall and weigh 200 lbs) so I can donate a unit of blood and suffer basically no ill effects whatsoever. I honestly wish they had variable waiting periods based on size, because I definitely don't need the full 2 months to recover from a donation. Especially at my age.
TAKE MY BLOOD GODDAMNIT! I DON'T NEED AS MUCH AS I'VE GOT! Feed it to a vampire or some shit, I don't care, just don't let it sit in me doing... well, not nothing, but it's not being all it can be ya know?