@kaia @Nicro We really enjoy eating cows, yes? so we raise cows, befriend them, manage their stress and health to optimal levels and micromanage their nutrition for perfect health, and adjust diet to calibrate the taste of their flesh. We have an entire science for this.

If I were a vampire, that's how I'd go about my favourite humans. A veterinarian but for humans. Thus, my humans would have the optimal health and blood taste.