One of the best Korean Actor..I saw him first in One more happy ending. Then I started to follow him.. After the journey of Cruel City.. 

I snap..and he became my favorite actor... He's so versatile.. Comedy, drama, action you name it!! He's really really good.. After the one more happy ending.. Im looking forward to his new project.. I hope he's character will be like Doctors Son again but in different plot... For me I like his role in cruel city. But he's good also in falling for Innocence.... :)

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I totally agree with you, JKH is a very versatile actor. He was awesome as Doctor's Son.
He's a very amazing actor! He is excellent in character portrayal. I hope he gets more attention and projects!
Watch the Ja Myung Go... he's so good as Prince Hodong.. Is there any news if he will have another kdramas this year? I want to try to watch the endless love but im hesitating coz he's not the main character... :)
He was really great in Falling for Innocence. I've loved him since then.
I really like him too:  He's great at comedy as well as serious roles.  If you haven't you should watch "Time Between Dog and Wolf"  It's old but really worth it.
I second Nat ^ haha TBDW was really great for an oldie & also if u're not afraid of family/weekend dramas there's Smile You that was so cute :) I had a lot of fun watchin him on that show despite the longs episodes!
I've never watched a family/weekend drama so i'm not sure how i feel about them, but i'm not afraid haha!.  How long are the episodes?  I also quite like a man who is not afraid to wear eyeliner (JKS & JKH do it best) so JKH is right up there.
Hehe niice xD Smile You is a 45 episodes drama of 1h05mins long each ep! & since you haven't started any family/weekend drama yet I'll warn you first, it's quite a bit like a sitcom style in this case, slightly over the top smtimes. It'll start with some characters being very immature or even hateful because then later on you'll get to experience their ''growth'' but usually when it's good all of that part is definitely worth it :) Lee Min Jung & Jung Kyung Ho have an amazing chemistry I really shipped them irl before she got married & he was revealed to having a gf...eh let's not talk bout that haha Anyways, if you do ever start it, let me know! I'd like to have your opinion on it :D
Well, I'm not sure I'm up for 45 episodes, but if I ever am, I promise to watch Smile, You.  I really struggled with the length of Empress Ki and Warrior Baek Dong Soo even though they were excellent.
His acting is so good that I'm literally in awe of how he does so many different roles with so much ease! There are no words to describe his talent!
Smile You is worth watching, you won't even think about how many episode it is. 
True true @darkangel662008 ! & sure @Nat you could watch it bit by bit if it helps :) It's as you wish hehe~