Also when Sayid asks Locke why he came... Is it for Jack... Locke responds "why else would I be here?" This just didn't strike me well since he says this right after they find the C4 in his bag.. He rarely went with to help people or search parties... He mostly did his own thing.

__________________
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.