I want to watch dramas where the couples have lots of affection for each other and lots of PDA

things like hugging,kissing,acts of love etc

Definitely Boss and Me!!

There weren't a lot of Intimacy here but kisses were passionate -  Cuo Dian Yuan Yang. 

As for Korean dramas, hmmmm... I've watched heaps but they're quite reserved. 

Oh!!  I Need Romance 2 had plenty if passionate scenes. 
Oh My Venus has a lot of PDA and affection and steamy kisses! Same with Love O2O!
I Need Romance series (1, 2, 3)
Oh Hae Young Again (Another Miss Oh)
The World That They Live In
It's Okay, That's Love
Jealousy Incarnate
It's Okay That's Love
Another Miss Oh
Bromance
Introverted Boss
Kuzu no Honkai. There is so much kissing, that at some point you'll get tired of it :D
loving never forgetting
eternal love
they kiss again
smile, you
personal taste
fated to love you
autumn's concerto
love o2o
murphy's law of love

Most Memorable, Natural and Intimate skinship and Kisses... and lots of it:

--- Too Late to Say I Love you

--- Cuo Dian Yuan Yang   

--- The World That They Live In      

http://mydramalist.com/17093-busujima-yuriko-no-sekirara-nikki
Queen In Hyun's Man
Buzzer beat
Something about 1%
The 2016 Something About 1%
Bromance.  Pretty sure there was one scene where they sucked face for at least 5 minutes. I'm not even exaggerating