New idea: You receive a quest from a powerful wizard who cured a master vampire of vampirism. The problem is that he still has the power to enthrall people, and he has created a small harem of female servants with his power.
Your job is to kill him and free the women. If you're playing as a man, it's a simple quest: kill him, get a cool two-handed sword, and go back to killing dragons. If you're playing as a woman, you'll be enthralled, and that's where the fun begins.
Due to your dragon blood, you randomly snap out of the charm, which gives you an opportunity to permanently break the mental hold he has on you with the help of the wizard who gave you the quest. However, your freedom from the vampire is temporary, and you will do quests for him while under his spell.
Actually, you will be doing quests for both sides, and if you complete one side's quests before the other's, you may free yourself or become permanently enthralled by your new master.