I'm kicking myself now for not taping Lost from the beginning. There's too much stuff that needs to be double-checked!
I like the wish-fulfillment theory of the island, but some things I can't reconcile with it. Sun seems not to be happy with her marriage. If the island were fulfilling her wishes, I think Jin would be dead. Everyone's wish is to be rescued - the island isn't going to fulfill that one. And, if the island gives people what they want, why did it (or its avatar the Not-Dinosaur) kill the pilot?
Also, do we know that Michael is Walt's father? Has the kid called him Dad at all? Maybe he's Walt's older brother, or his uncle, or something. Anyway, what is Michael wishing for? I'd guess, either to be a good father (figure) or not to be saddled with the kid. I haven't seen any sign of either one being fulfilled. Or of any wishes from Michael at all.
One thing I see that all the survivors have in common is that they didn't want to go wherever they were going. Jack had to go back and deal with his awful family and his father's funeral. Kate was going to trial and probably jail. Maybe Sun didn't want to go to the States and/or continue her loveless marriage. Maybe Claire didn't want to be a single parent, and the closer the baby's birthday comes, the closer she gets to going someplace she doesn't want to go - single motherhood. (However, she doesn't want to lose the baby, obviously.) Talk about a village - she'll have 45 people helping her when this baby comes. Well, 44. Shannon doesn't seem like the babysitter type. I don't know what the otehrs might have wanted to avoid, but there's enough tension there to think they could've had some unpleasantness coming at them. Hurley's the only one who seems to have no dark secrets. (I love Hurley.) Getting crash-landed on an island with little hope of rescue is a guilt-free way of never having to go home and face the thing you most want to avoid. (I may be thinking this because I recently had to go back home and deal with something I really really wanted to avoid, and for a while there, "stranded on a remote island" was looking like a pretty good alternative.)
Damn, I didn't even expect to LIKE this show, much less be analyzing it to death.
(edited to clarify, though you probably can't tell.)