I'm not really into fluff. I love dramas with a mature kind of feel. Also ones that always keep you on your feet and are super unique (like the Korean drama Save Me).  But honestly, if you think the drama was amazing, no matter the country, I would be grateful for a recommendation! ^^

Welcome to MDL! You should definitely try Misty. It's currently airing but there's only one week left. Definitely mature, excellent production quality, and a story that will keep you guessing. 

These are my recommendations:

It's okay that's love

Pride

Just Between Lovers

Buzzer Beat

Signal

Stranger

Maou

Healer

Kill me Heal me

Kazoku Game

The Quiz Show 2