I'll be honest, I can accept Half-Orcs, I can even get behind Half-Elves if they're rare but accepting the existence of Dhampirs is a hard pill to swallow, leaving beside the fact why Vampires would willingly consort with what they view as prey I am also a firm believer that immortality should come with tradeoffs, you want to live forever than you lose your ability to create new life, also the idea of a corpse that can impregnate/get pregnant just stretches believability, TL:DR Dhampirs make no logical sense and I hate them.