I like emotional hurt - with my favorites being temporarily unrequited love, fear/terror of losing someone, or just going through something harrowing/traumatic. Nightmares are a favorite of mine. Illusions/nightmare traps where someone lives through their worst nightmares, gets trapped in fantasies they can't have... I really wish we got more from the Nightmare Master against Shen Wei or Zhao Yunlan!

This matches well with my preference for comfort offering safety, reassurance, and a chance for characters to allow themselves to be vulnerable. To show that they're afraid, and know that the other person can be trusted with that vulnerability and whose presence can make that fear go away. Praise kink, touch, voice kink, and other cuddly comforts work really well for me here.