Kim Hyun Joong. Definitely!
Lee min ho's curly hair sort of irritates me, no offense. Kim Bum is so great but there's cant even be a comparison made with Kim Hyun Joong and the same for sung il guk-hyun bin.
Apart from Kim Hyun Joong being crazily handsome (I swear, if he were to be arrested it would be for blinding everyone's eyes from his perfection) and insanely talented, he has a great sense of humour and a really big heart. In one of the youtube video uploaded he said that if he had a lot of money he would host a $10 million concert, inviting all the fans for free. He's actually really smart as he got into a really good college and you'd be crazy to say that he wasn't the whole package. He's also good friends with a person in Big Bang named TOP, which makes me love him even more as they're one of my favorite bands as well, apart from SS501 which he's the leader of. TOP and Kim Hyun Joong were childhood friends and even TOP couldn't deny the fact that KHJ was amazing at the guitar. Talking about musical instruments he can also play the piano, violin and has a damn sexy voice when it comes to singing. He has enormously big eyes for a korean, in one of the videos they interviewed people from his home town and they said he was a born performer! He's also a great actor staring in 2009's biggest drama, boys over flowers and Mischievous/Playful Kiss. God, i love him to death. To be frank, I would give my whole world and more just to meet him and I spend too much time "researching" on him. I LOVE HIM!
OH BTW. he's going to star in a new drama soon called "cinderella"