A good ending

So I've been disappointed in the endings of some of the dramas I've been watching lately. Can you recommend a series that has an ending that wraps up everything well, you get a sense of closure and our satisfied with how it turns out? I prefer happy endings but it doesn't have to be. I watch all sorts of dramas. Revenge, serial killer,  body swap and BL are my favorite kinds.

 AH :

I feel like satisfaction with an ending is super subjective, so obviously these are just based on my personal opinion. YMMV. 

Dramas that include a revenge element where I was relatively satisfied with the ending:

• The Princess Wei Young
• Itaewon Class
• Secret

Dramas with serial killers where I was relatively satisfied with the ending:

• I Hear Your Voice
• W
• Come and Hug Me
• Hello Monster

BLs where I was relatively satisfied with the ending:

• Semantic Error
• Be Loved in House: I Do
• About Youth
• Utsukushii Kare

Thank you for your suggestions.

Come and Hug Me is my Ultimate Favorite Drama. And I've seen all the BL dramas you've mentioned and enjoyed them as well. So, I will start watching the other dramas you mentioned. I'll start with Itaewon Class.

Wonderful life