Their reflexes are heightened as well as their senses. And not only do they have tremendous strength and reflexes, but they see nearly perfectly in the dark, and can climb walls with ease, even sheer surfaces. The blood is life. The blood is nourishment. Its taste is nectar to a vampire's tongue, and their only source of sustenance.
Vampires can only feed upon living blood, though from a variety of sources.
Preference is tempered by difficulty, in that the blood from an animal, while the easiest to obtain with little danger, is also the worst tasting. Consequently, the blood of another vampire is most delectable, but also the most dangerous to find. Humans fall between the two. To create a vampire, the victim's blood must be drained to the point of death, at which point he or she is allowed to feed from the vampire's blood. The vampire must have at least 40 in their vampire score to do this.