I'm sure this has been mentioned before, but Jack's motivation for rebooting the time-space continuum is really weak. He says it's because of Kate...is he really willing to kill hundreds of people for one girl? Seriously? And then he tells Kate it's for Claire. I don't buy it for one second. My opinion...he's doing it for Locke. He feels guilty for John's death and he wants to fix it. Fix being the key word. Jack's character has always been about "fixing" things, and he wants to fix his mistake, which was not believing in Locke. Anyone have any theories on our very annoying-as-of-late main character?