Walking Dead Season 2

I'm glad that Shane put a bullet in Otis - it opens a pile of new character questions...

...did Shane really think that Rick was dead? Or did he say it because he wanted Lori and thus wanted to believe it?

...does Shane's plan to leave the group really hinge on removing tension, or does he have a darker motive?

...did Shane shoot Otis as an act of self-preservation? As retribution for Otis shooting Carl? Because he determined that Otis' life was expendable when compared with Carl's?

...who will find out about Shane shooting Otis? What will the result be?

I like the character-driven aspect of the show....but I would certainly be happy if there was a little more Zombie slay'in thrown in for good measure.