SONG JOONG KI, So Ji Sub, Joo Won, Lee Min ho, Jo In Sung, Yoo Seung Ho
Song joongki Woo bin Lee jong suk Park shi hoo Lee jun ki Ji sung Yoo seungho Hyun bin Yoon shi yoon Kim bum Joo won :D
So Ji Sub Jang Geun Suk Lee Min Ho Lee Jun Ki
Jang Geun suk, Park yoo chun, LEE SEUNG GI lee jong suk, so ji sub, Ju in sung
Hmm... Hyun bin, Seo In Guk and Lee Jong Suk
Lee Jun Ki, Lee Min Ho, Lee Jong Suk, Joo Won, Song Joong Ki, Hyun Bin and Joo Sang Wook
Jin Mo Joo, Jung Woo Sung , Seung Heon Song, Bin Won and Kim Sung Oh.
I've so many!! Lee Min Ho all the way though. And then HYUN BIN, JUNG IL WOO, GONG YOO, JANG GEUN SUK, KIM WOO BIN
Yoo Seung Ho, Ji Sung, Song Joong Ki, So Ji Sub, ...
lee jong suk - love park so ha kang dong won - love maundy thursday and the duelist and lure of the wolves song joong ki - truly talented yoo seung ho - miss the guy kim so hyun - he cries, i cry yoo ji tae - amazing yoo shi yoon - he needs nicer projects jung woo - loved him even before he went to the army yoo yeon seok - he can be good or bad, he's still undeniably great jo jung suk - he can be funny, he can cry, i still love the guy
Lee Min Ho Ji Sung Lee Jun Ki Yoo Seung Ho Kim Woo Bin Kim Soo Hyun Sung Joon Kim Bum Song Joong Ki Lee Seung Gi Joo Won
Male:

Lee Min Ki - He is so quirky, that he would be able to pull off any role. (And can we get a drama/movie/mv where he doesn't die)
Jo In Sung - I really want him to do more movies. Mainly because they're more serious than dramas, for the most part.
Park Shi Ho - He has great potential and I kind of want hi and Moon Chae Won and Song Joong Ki to do a drama together, because I ship both of those xD
Song Joong Ki - Great talent. I want him to continue taking part in movies :)
Kim Bum - Recently saw 'Psychometry' and damn. I need a drama/movie, where he's a bad boy or some type of thief. I don't want it, I literally need it.
Joo Won - Need I say more?
Kim Soo Hyun - Loved his small role in 'The Thieves' and his current project 'You Who Came From The Stars' is amazing as well.
Jung Il Woo - I love how funny he is, his expressions have me cracking up all the time, but he can still pull of the more mature chraracters.
Ji Sung - The first time I saw him was in the movie 'My P.S Partner' and I thought I would never be able to unsee that character, but he proved me wrong in 'Secret' with his considerably dark character.
As for idol actors: Yoochun and Seo In Guk.

Female:

Jun Ji Hyun - Queen. I love her characters and she seems like such an awesome person as well.Not you typical korean actress, in a good way.
Moon Chae Won - Thank you for not picking the standard easy roles, you've truly shown how capable you are as an actress.
Song Hye Kyo, Shin Min A are also amazing.
Lee Jong Suk Kim Woobin Lee Minho Seo In Guk So Ji Sub
Song Jonog Ki, Rain, Hyun eun Hye, Park Yoo Chun, Seo In Guk, So Ji Sub, Song Hye Kyo, Gong Yoo, Hyun Bin :D