Guilty pleasure or masterpiece? Maybe both...

Okay so this question has two parts. First, what is a manga/manhua/manhwa that to you is genuinely a masterpiece; aka something that you’d be (willing to / have already) openly sung praises about. Everything about it is flawless...

Secondly, what’s a manga/manhua/manhwa that for all intents and purposes is pretty much trash, but you can’t help but love? Maybe you’ve reread it a ton, or you searched for other media around it like fanart, videos, reviews, etc.

Now lastly, are these two manga/manhua/manhwa one in the same or different? Do they share any qualities?

(PS: Sorry if this question has been asked before already)