I don't like blood bank so I can't answer for that but this one had a good storyline with characters having depth. The physical relationship was onset for far much complex storyline rather than just being about bdsm and such.
Most bl manhwas even now are just about smut with barely any stories and progression. While this one contained smut, the primary storyline was the main factor and driving force.
It is okay to not like it though. Everyone have preference.

I genuinely don't understand why everyone like this manhwa so much ...
I read it halfway but it didn't appeal to me just like the one manhwa called blood bank ( everyone was also so fond of that in comments)
I think it is due to your nostalgia
I don't like the amount of rape or bdsm .
I mean I get that he is a royal but I didn't like how submissive and quiet the bottom was ..
It's just my opinion on reading it ..no hate to those who like it ...