I'm a 30something fundashi from BR/IT.
Things I like in stories (the more of these the story has, the better):
- Older seme, younger uke
- Rich seme
- Long but engaging
- Hot seme
- Supernatural themes that are not angel/demon
- Straight seme (Bi seme is okay too)
- Uncensored
Things I hate in stories (if the story has one of these, it's an immediate no from me):
- Older uke
- Tragedy/unhappy ending
- Ambiguous or open ending (that's why I normally only read finished stories)
- Crossdressing seme
- Oneshot
- Horror and Psychological (not always but almost)
- Straight uke
- Uke who wants to be seme (even if it's just mentioned)
- Switch (almost always)
- Multiple stories/pairs (principally if they are oneshots or very short)
- Time skip with main pair appart or broken up
I liked this very much, but Eunyoon is quite a bit abusive, and it's never addressed. It's a pity. We also never got to see much of what happened to the in laws after he was hurt.