Lost (The Final Season)

I saw that in the Ustream that I wasn't alone in being a huge Lost fan, so I figured I'd start this.

What does everyone think of the final season?
Favorite episode so far?
Favorite character?
Crazy theories?

I think it's amazing so far (Lighthouse definitely raised the bar for future episodes) and I am so excited. I'm a relatively new fan, but Lost is epic. If you haven't seen it yet, go. Now. Otherwise I will find you, get a chair and some rope, tie you up, and force you to watch an episode. Just kidding. No, I'm seriously kidding. That'd be creepy and I'm not pulling a Sayid.