If he's at all like his characters, I'd marry the man.
I personally think that his quirkiness is stunning, particularly his performance of Daniel in Lost. He was by far my favourite character, and still is. He was the best looking, played the best role for himself as an actor, and was simply the best character.
All this is in my own opinion.
I don't know much about him as a person, but if he's anything like the roles he plays I'd love to meet him. Very attractive man.