Which Korean actor out of the ten on this list is your most favorite?

This is so hard!

So Ji Sub

Lee Joon Gi

you are evil LOL

Only one huh...... Jang Hyuk

Second - Ji Sung, Third - So Ji Sub - everyone on your list are very good actors, but I've seen the most variation in character portrayal by Jang Hyuk simply because I've seen more of his work ;)

Lee Dong Wook ^^

Park Seo Joon

The two other's that were making it difficult for me were, Ji Sung and Park Hae Jin. Seo Joon just beats them 

Hard choice between gong yoo, ji sung, and so ji sub 

But I’ll say ji Sung after seeing his phenomenal acting in both secret and kill me heal me 

Oh, man. Several of my favorites are on there. It's really hard to choose between Lee Min Ho and Lee Dong Wook. (And Lee Joon Gi!) Since I have to choose, I'm going to go with Lee Dong Wook. 

(But really all of them. .... And Gong Yoo.)

Amongst the one listed, I would say Lee Dong Wook.