Although I love Hurley, I'm gonna have to agree with Mali on this one, Sawyer!
Sawyer's a huge dick in the beginning, he's just selfish and rude, yet he's always witty.
I loved seeing him develop into the sweetheart he is, he has a heart of gold, and Kate/Juliet really brought that out of him. I also felt so much for him in season 6 :((
Also Sawyer's always been hilarious, he has something to say about everything and his nicknames are great as well. He's definitely right behind Sun for me < 3