He also like Jack in the bearded man FF said they had to go back to the island the island wanted them to come back they weren't supposed to leave..and Kate is telling him NO... Jack does the same thing to Hurley...I just wonder what it is that sets each of them off to the point of obsession with the Island.. Jack like I said before seems that he is on the road to the bearded man with Hurley...

So at some point does everyone who makes it off the island want to go back??? IF so WHY??

__________________
Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.