I like how they are tying in the losties with the others as I believe their fates are intertwined.
Ethan was the surgeon...did not know that, would still like to know why he went loopy for Claire.
Jacks convo with Tom about how they aren't the ones who are kidnapping etc was something I've been waiting for. I found it odd that Toms response was of glass houses as that did not ring true to me.
I don't think it is any secret that Jack is looked on as the leader of the losties and that was confirmed by Locke when he talked about how the group needed the doctors leadership.
One of my favorite things about this show is when they insert a characters back story as part of the overall plot. I'm always left to wonder who's story is going to be told next week.
This is a very complex show with a complex plot, one that does not try to insult the viewer by dumbing in down just to make it more main stream. I don't care which of these character(s) they focus on from week to week as I find them all facinating and complex. This is one of 2 shows that watch live, the other being survivor, because I can't wait to see what is going to happen next.