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Do blood types affect how said blood tastes?
What about astrological signs?
Is there something you prefer to have your blood-letters eat before you drink their blood? (Baileys, ftw)
As someone who probably drinks a lot of it, i'm optimistically setting out asking vampire communities these obviously essential questions, because i have yet to hear of any blood-bank that hires 'wine-tasters'.

i think some hands on research is needed

I think more research needs to be done here before this can even be a conversational piece. If I am wrong I am sure it will be brought to my attention, but this is going no where.