As a vampire or werewolf would you like the option of being able to turn/infect NPCs with your disease? Say when the sleeping you give them a bite on the neck to change them to a vampire and having them follow you. Or while there sleeping get the option to kill them aka sandman perk just for your vampire drain them of all there blood or werewolf, um idk start eating them. Honestly I wouldn't mind if i can infect an entire city causing them to turn and now only be active at night. I personally loved the the Vampire mod that allowed you to have a vangs, better eyes, blood from your mouth when feeding, feed from a kiss and from an awake NPC, and have a turned vampire follow you and have him feed off sleeping people too.
What would you like to see, have or do?
Also but off topic I would love to kill a king and queen or become a king.