Something that has low MDL score, but for you guys are one of your favorites. 

For me is Like: Forecasting Love and Weather, Lovestruck in the City and She Would Never Know.

Smile You, Save The Last Dance For Me, Tamra the Island (just ignore the first episodes), Couple or Trouble

Twelve  - it wasn't as bad as everyone said, Omniscient Reader: the prophecy - as someone who don't know original material I believe it's great movie

Ugly Alert (not sure if 8.3 is a low score though, but this is an underrated drama)

Kakafukaka - It's not your typical romance and it's about a mature topic but with some humor. It also shows the stupid mistakes even adults make. I like it a lot!

couple or trouble (2006) is pretty good and it's based on one of my favourite romcoms

Psychopath Diary: it's one of those few dramas that has both balanced and executed the genre of comedy+thriller

 marguerite blakeney:

Ugly Alert (not sure if 8.3 is a low score though, but this is an underrated drama)

Truly a great long makjang drama, great story combined with the lovely chemistry of the leads. deserve a higher score indeed. 

 Annie:

Truly a great long makjang drama, great story combined with the lovely chemistry of the leads. deserve a higher score indeed. 

I will bite it, and watch this